ITunes is Apple's digital media application and online store. You're able to sample and purchase songs, albums, television shows, movies, books and apps directly from the iTunes store. With a few clicks of your mouse, you can navigate through the store along with purchase digital media. When you created your iTunes account, you might have linked your credit or debit card to your account. However, if you have a PayPal account, you can edit your account information to use PayPal to make purchases.
Launch the iTunes application.
Click on your account name located at the top right part of the iTunes program. It is under the search box. You will be prompted to enter your password.
Click the "Edit Payment Information" button.
Click the radio button next to the PayPal logo.
If you don't have iTunes on your computer, you can download it for free from the Apple website. Once you download the program, click “Store” from the menu bar along the top of iTunes. Select “Create Account” from the drop-down menu. Follow the on-screen prompts to create your account. Then choose PayPal when you reach the payment information screen.