Are you sure you have exactly 12 words? If so, I doubt those words have anything to do with blockchain.com wallet.

Blockchain.com started to use 12 word BIP39 seed phrase in 2016.
As you say you created your wallet in 2013 (which is before their upgrade), your seed phrase should include 16-17 words.

Search in your email inbox and see if there's a .json file. You can recover your wallet if you manage to find it.

chaser15 account was locked at the time of creating this topic and he used his alt account for creating it.
Now, he doesn't remember the password of the alt account.

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To OP:
You should be able to reset the password of your alt account using the email address used at the time of its registration. Just click on "Forgot your password?" option.

The fee you pay for every trade is the sum of the trade fee and the transaction fee.

The trade fee is a percentage of the trade volume. So the bigger amount you trade, the more you have to pay as trade fee.
The transaction fee depends on network state and doesn't depend on the trade volume.


Edit:
According to this article, the trade fee is 0.25%.

Does your transaction broadcast and fail or it doesn't broadcast at all?
Do you have ethereum in your wallet? For making any ERC20 token transaction, you need to have ethereum in the address you send the token from. It's needed for paying the transaction fee.

If you have ethereum in the address and the problem is that your transaction fails, please share the transaction ID. It may be helpful to understand the issue. (If you don't concern about your privacy, of course)

I haven't ever used the service you are talking about and I just made a search to find it.
In the case this is the service you are talking about, it seems that they are also using pancakeswap service. Therefore, the fee you pay for your trades there should be same as pancakeswap.

As stated by mocacinno, the rule prohibiting users from enrolling multiple accounts in a bounty/signature campaign is usually set by bounty/signature campaigns managers, not the forum.

In the case someone joins a campaign with multiple accounts and that's caught, the user will probably get negative trust from other users.
Since almost no campaign accept users with negative trust, there is no difference between getting a negative trust and getting ban for those who are here only for campaigns.

It seems to be a bug.
I just made a search and found the following topic. yslyung reported a same issue with Armory in 2015. OP's image has been also taken in 2015.
Suddenly too much BTC in my armory ? Weird issues.

The balance shown in that old topic is 184467440736 BTC. That's same as OP's balance here.

2200 euros? Are you sure of that?
As I already said in my previous post, the transaction fee in ethereum network is so high. But not really that high.
2200 euros worth of ethereum is 0.58 ETH and I am pretty sure you didn't pay that much for transaction fee.
Assuming all the 0.0015 ETH has been spent for the transaction fee, that's only around 6 euros.

If the new wallet supports that coin/token and uses the same derivation path as trustwallet, yes. Your fund will appear in the new wallet.
As stated by Bitcoin_Arena, most wallet use the same derivation path and that shouldn't be a problem. But there's chance the derivation path is different.

Also note that it's not recommended to use a same seed phrase in two different wallets. It may decrease your security. I suggest you to make a new wallet (with a new seed phrase) and move all your fund to that after you swapped your coins.

As far as I know, trustwallet doesn't allow you to export individual private keys. (Someone correct me if I'm wrong, please)
For exporting your wallet from trustwallet, you must use your seed phrase.
Given the different derivation paths used by different wallets, there is no guarantee that the seed phrase given by trustwallet will give you same addresses for all coins/tokens in a different wallet and you may have to make a transaction and pay the network fee.

I guess all your 0.0015 ETH was spent for paying the network fee.
Currently, the transaction fee on ethererum network is so high, especially when you call a smart contract. Given the current state of the network, I don't think 0.0015 ETH is a big amount for transaction fee.

As said by JeromeTash in the above post, please share your transaction ID (If you don't care about your privacy, of course). It can be helpful to find out what happened to your ETH.

You must import the private key into a wallet and then send the fund to an exchange.

Given the high value of the fund and for more security, you can import the private key into an offline computer and sign the transaction there. A good option with such a feature is electrum. (There are other good choices too.)
In the case you want to use electrum, download it only from its official website and do not forget to verify your download.
Click here to read the guide on how to spend your fund without your private key touching the internet.

Note that you should deposit the fund into a reputable exchange and read its terms and conditions before depositing the fund. They may ask you to verify your identity.  

What's the code you are talking about? (Don't post it here, just tell us how it looks like)
Is it a private key or a seed phrase?

If that's a private key, it should start with 5, L or K. (There are other formats for a private key, but they are not common)
If that's a seed phrase, it should be a series of words (usually 12 or 24 words)

A single private key get you access to a single address.
As stated by Little Mouse in the first reply, if you want to access more than 1 address, you have to import all private keys. For accessing x addresses, you need x private keys.

The easier method is to use your seed phrase (a series of 12/24 words)
Your seed phrase can generate all your private keys and can be used for accessing all your addressees easily.  

By 5 accounts, if you mean 5 addresses in a single wallet, you need only 1 seed phrase.
If you mean 5 different wallets, you need 5 seed phrases.

It has been more than a year since their twitter account was suspended.
Click here to see the post made by terciduk123 regarding the issue with GOLD twitter account, 1 year and 3 months ago.
It seems that the twitter account will remain suspended forever. I think it would be better if the link to twitter account is removed from the website.

In the case someone hasn't saved that code, it's still possible to backup the 2FA codes.

Google authenticator allows you to export your accounts using a QR code. (more than 1 QR code, if you have many accounts)
You can save that QR code and use it whenever you want to use a new device for any reason.
To do so, you should tap on the "3 dots" button at top of the screen, select transfer accounts and then "Export accounts".

Since your phone doesn't allow you to take a screenshot from the QR code due to security reasons, you have to take a photo using another device.

As long as we don't know what's the QR code, no one can help you. As mentioned by LoyceV, we need more information.
Scan the QR code using a QR Code scanner in a safe device and tell us how it looks like. (Don't ever share the code here, just tell us the number of characters and the letter/number it starts with.)

Isn't that a series of words?
There's also the possibility that they are your private keys.

It would be better to install the google authenticator in another device. The thief can't access your account only with google authenticator.
If you install kucoin, google authenticator, your email application all in one device, then your account may be compromised in the case your phone is stolen.

Also, do not forget to keep the secret key (the key kucoin gives you for setting up 2FA in google authenticator). It can be used if you don't have access to your phone for any reason.

Why the ban hasn't been reported in the modlog?
As far as I know, the modlog doesn't report the ban only if that's temporarily.
According to the rules, since chaser15 (the hacker) has shared a malware, the ban should be permanent. So, it should be displayed in the modlog. It's weird.

Are you sure your account has been banned?
There is no record in modlog. Maybe, you have been banned temporarily?

Most probably, some one hacked your account and made that post.
Click here to see your IP logs in the past 30 days.
Do you see any strange IP address there?