The amount you buy for that card is the amount that is in that iTunes Gift Card. You must activate it through the iTunes Store (there is a redeem gift card option towards the top right portion of the iTunes Store home page).
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
smack yourself
It is illegal to give out a iTunes gift card codes; to get these codes you must purchase an iTunes gift card.
there is no such thing of a you tunes gift card. it is called an itunes (notice how there is no space in itunes) gift card. an itunes gift card is for buying music off of the itunes store for your ipod.
You don't. iTunes does not work that way. When you buy the card at the store, it doesn't activate until the cashier receives money for it.
The lowest iTunes gift card is 20$
Yes, you can buy television shows with an iTunes gift card.
iTunes gift cards can only be used at the iTunes store.
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.
How to get free gift card
It is possible to purchase an iTunes Gift Card at a gas station if that particular gas station stocks iTunes Gift Cards.