Q: I paid for a app and now I can't download any free ones it was a gift card so I can't add money to it how can I dwnload apps

- You need a valid payment method even for free apps. Purchase an iTunes gift card and redeem it into your account

iTunes Store: How to redeem a code

- You can also add a credit card to that accoubnt

- Further, you can create a NEW account using these instructions. Make sure you follow the instructions. Many do not and if you do not you will not get the None option. You must use an email address that you have not used with Apple before.

Creating an iTunes Store, App Store, iBookstore, and Mac App Store account without a credit card