To buy items in the iTunes Store, you need one of these accounts:
An Apple account. If you’ve purchased items from the online Apple Store, bought an iPhoto book, or are a MobileMe customer, then you have an Apple account. If you don’t have one, you can set one up using iTunes.
An AOL account. If you already have an AOL account, you can use it instead.
After you have one of these accounts, you can set up an iTunes Store account and specify how you want to pay for iTunes Store purchases.
Note:AOL accounts can’t be used in some countries. Check with your country’s iTunes Store for more information.
To set up a new iTunes Store account:
In iTunes, choose StoreÂ > Create Account, and then follow the onscreen instructions.
If you already have a PayPal account, you can use that as your payment method when you enter your credit card information.
Note:PayPal isn’t accepted for payment in some countries.