It has nothing to do whether you have an itunes account or not. you can download itunes without having an account. you just won't be able to buy anything from them.
No
Preferences -> Itunes sharing
no
You can't.
just go into itunes and create a new account. u cant have more than one account on an ipod unless its on the computer too
you cant unless it was a library with an account
you can og into your itunes account from the other computer
The Twilight Album is already on iTunes but the only song you can buy off it without buying the CD is Decode By Paramore
You can create an iTunes account without inputting card details. That's why they sell iTunes cards.
Simply credit your iTunes account with the value you owe for the app, it should then automatically pay for the app. If it does not automatically deduct the amount owed, email apple and ask them to manually deduct it from your account.
Buying one song on iTunes is considered buying a single.