These instruction are for registering an iTunes Account for FREE:
The following provides exact instructions on how to Create an Account in iTunes for your iPod WITHOUT USING A CREDIT CARD. You must follow these instructions EXACTLY!
Create an iTunes App Store account without a credit card
> Open iTunes
> On the top menu, click on App Store
> Scroll down and click on Free Apps – See All link
> On the very first app, click on GET APP button
> This opens up a new window. Click on Create New Account
> Click Continue
> Agree to the Terms and Conditions (put check-mark in box)
> Fill in Email, Password, Security Question, Date of Birth
> Click Continue
> Beside Method of Payment, choose NONE
> Fill in the Address Form (completely)
> Click Continue
> Verify your account by checking your email. Confirm your Account in the email.
> Open the email from: iTunes Store
> Click on the Verify Account link in the email.
Then Sign into iTunes using the email and password used to create the account.
Aside from these instructions above, keep this Instructional Link on How to Create an Account in iTunes for future reference:
Create an iTunes Account for FREE