Your itunes gift card code is in a separate email.
Account set up is pretty easy to do, I recommend this way.
#1 Make sure you use an EMAIL address that has never been used for any other itunes
before. Yahoo.com allows you to sign up for a free email account.
#2 Install the latest version of iTunes. You can download it (it's
free) from the Download iTunes webpage. If iTunes is already installed on
your computer, check your version and update if necessary. Here is a link
http://www.apple.com/itunes/
#3 Open iTunes.
#4 In the Source list (to the left side of the iTunes window), under the catagory STORE, click on "iTunes Store".
#5 In the upper-right corner of the iTunes Store window, verify that
the button next to Account says Sign In. If this button displays an email
address instead, click the button and then click Sign Out.
#6 In the "QUICK LINKS" window (to the right of the itunes window), click on "REDEEM".
#7 In the resulting screen, enter the 16-digit code (it will start with an XXSP), then click Redeem. THIS IS THE CODE(S) THAT I'LL EMAIL TO YOU.
#8 In the resulting screen, create your new iTunes Store account. You
can put in any street address as long as the zip code is an actual city in the US
(55419 is Minneapolis, MN).
#9 You will have the option to enter credit card
information; click the NONE button on the Payment screen.
#10 Once you've redeemed your code, the credit amount will appear next to the Account details in the upper-right corner. Each time you purchase music, iTunes will deduct from the credit until it's gone. If any purchase exceeds your account credit amount, iTunes will
ask you to enter a credit card number. At that point you should buy and enter more cards to increase your credit balance before continuing.