iTunes: People often get confused when they go to create an Apple ID in iTunes, only to find that a credit card is required to proceed (even if they weren't planning on purchasing any apps). Oddly enough, whether or not iTunes will give the option to choose "None" for a credit card will depend on how the account is created.There are two ways to create an Apple ID in iTunes. The main way is to actually click "Create Account" in the Store menu, which is what most people tend to do. If you do it this way, you won't see "None" listed in the payment options — you have to choose a method of payment to proceed.
The second way to get to the very same account creation walkthrough is to try installing a completely free app while not signed into an account. There's just one thing that's different if you do it this way; there's an option for "None" at the end of the payment methods.
This method works in both iTunes and the Mac App Store. We've mentioned this approach before when describing how to set up a US iTunes account, but it's also worth knowing when setting up a basic account anywhere.
When iTunes Won't Let You Create an Apple ID without a Credit Card? [Digital Inspiration]