how to login to iTunes
how to login to iTunes & app store . it is asking credit card details. i don't have credit card
iPhone 4S, iOS 8.4.1, iTunes
If you don't have a credit card then follow the instructions on the page that you posted from to create a new account : Create an iTunes Store, App Store, or iBooks Store account without a credit card or other payment method - Apple Suppor…
If you don't use those instructions you will need to enter credit card details before you can use the account.