3) Go on
https://www.eos.io/distribution/ and redeem the EOS. Will the EOS be in my Metamask wallet?
4) I can now send my EOS on exchanges and sell them? If I do sell the EOS before the last ICO (2018) I am good (dont need public key)? What is confusing me is the public key thing.
3) After claiming my EOS using MetaMask, I had to click the "Tokens" tab and click the "+" sign and add the EOS token info in order for my EOS to appear in my wallet.
Token Address: 0x86fa049857e0209aa7d9e616f7eb3b3b78ecfdb0
Decimals: 18
Symbol: EOS
Name: EOS
You can find the above info by scrolling down here...
https://eos.io/instructions4) Yes and Yes. With the Public Key registration(as I understand it) you are reserving a wallet/address in the EOS blockchain. When the time comes, your Ethereum wallet will be your ticket to your "reserved seat"/wallet/address. Write down/backup your EOS registered public and private key as well as your ethereum wallet and password.