You cannot use an iTunes gift card twice, for once it is used the servers at Apple will know that it has already been used, therefore you cannot use it twice.
Sorry, you can't use an Visa gift card on iTunes. However, you can use your Visa gift card to buy an iTunes gift card Source: http://blog.giftcardrescue.com/itunes-gift-card-questions-answers
iTunes gift cards can only be used at the iTunes store.
NO
no you need to set up an account before you can use a gift card
The iTunes app card is only for Apps for the iPhone or iPod Touch.Read more: What_is_the_difference_between_an_iTunes_card_and_an_iTunes_apps_card
No. Technically, a prepaid MasterCard Gift Card is a debit card. iTunes does not let you connect debit cards to your account and use them to buy things.
yes
no but u can use it to buy a itunes card in store :D
In the iTunes or App Store apps there is a Redeem button at the bottom of the page which is used to add an iTunes gift card.
No. You can use PayPal and any major credit/debit card, as well as an iTunes Gift Card.
To use an iTunes Gift Card to pay for your songs click on the Redeem link in the Quick Links box (top right) on the iTunes store home page.
iTunes gift cards are only valid at the iTunes store online. The Apple stores use a separate system.