Buying in and Mining (complete Noob to this a few questions)

Hello All, I just registered but I have been putting it off for awhile now. I hit a road block with Bitcoin, Litecoin, and my understanding. I am more interested in Litecoins at the moment, and I'm still reading up on both.

 
I was trying to figure out how to buy into Bitcoins and Litecoins. I made a account at mx.gox, but they want photo Id and proof of residence to buy bitcoins. I don't believe they support Litecoins. So  is BTC-e ok for Litecoin purchases? Also I'm confused on how exactly you get money into these sites such as BTC-e and ect?
 
 
Lastly another question I had was can I mine on my little itx rig with a 3570k and a gtx470 until  my main rig is back up with Haswell?  Would it even be worth it?
 
 
Thanks for your patience and help

if you are going to mine with this definitely use cuda miner, i have two nvidia cards, and im getting 190-210 kh/s before i was getting like 120...... so yea cuda miner is the way to go. not sure about btc-e myself and someone should definitely let us know. if you have any questions about a good pool to join i have one i just joined and i could help set you up. pm me if you need any help

Thanks, I will Pm you after I get my old rigs setup. I have about 3 montherboards with cpus laying around. Only two 470's though. I should be able to have all three mining hopefully.