1 - If my computer crashes, and wont restart (its dead) how do i get back into my wallet from a different computer?
You do keep multiple backups of valuable data stored in multiple locations, right? It would be rather foolish not to.
2 - I have "encrypted" my wallet, and set the password, however it still lets me log into it without any authentication at all. Is the password only needed to send money - as in anyone can view my wallet by clicking on it?
Correct. The password is only needed for actions that require the private key (sending bitcoins, signing messages, creating new addresses). If you want to keep people from seeing what your addresses are, you'll need to do your own separate encryption.
3 - After you mine coins, your pool pays you out after a certain amount. Would you reccomend to leave it in your wallet until you want to sell it?
I'd recommend not selling it. Hold on to it until you have something you want to spend it on, then spend it directly. But you have to make your own decisions about risk tolerance and what your plans are for your bitcoin. Other than leaving it in your wallet until you want to sell (or spend) it, what other option were you considering? Where else would you store it?
4 - Can you "store" money on an exchange such as btc-e or mtgox until you choose to sell it? or is it only meant for current orders like a stock exchange?
You definitely can do this. But be aware that several exchanges have been hacked in the past and those who had BTC on deposit there lost there bitcoins. You need to decide for yourself if you're willing to risk the possibility that the exchange could steal your bitcoins, a hacker could steal your bitcoins, a government agency could confiscate the assets of the exchange, etc.
4 - What is the most efficient way to convert cryptocoins into currency or a into paypal account?
4 again??
Define "efficient"? If you are looking to get the most local currency for each, then your best bet is probably
https://localbitcoins.comIf you are looking for fastest payment, then you might want to look into http:/fastcash4bitcoins.
If you are looking for a fast transaction with lower fees, then you'll want to use one of the exchanges such as MtGox or CampBX.
5 - Has anyone every sold crypto coins in person? (AKA Craigslist) I think this would be funny. Meeting someone in person, handing over cash to a guy, who then opens up a laptop and sends you crypto currency.
I've done it several times. I'm not sure why it would be "funny". It's a great way to meet other people interested in bitcoins and to make an exchange where neither of you need to pay any fees. As I said, take a look at https:/localbitcoins.com
