Music
You have to make an apple id on itunes in order to make a purchase.
Yes. Set up the ID on itunes first
You can create your Apple ID at appleid.apple.com, iTunes PC iTunes Mobile
You create the Apple ID on iTunes or on the iPad itself.
Connect your ipod to a computer and download itunes. Once installed, open itunes and register your ipod, there you will be asked for your email which will end up being your apple id!
To download apps and music or videos
ids
Yes, you can. You could buy songs off of iTunes on that person's computer, but they wouldn't sync into yours. If you bought something off iTunes, synced it with your iPod, then hooked up your iPod onto your computer, then it will overwrite all the songs on your iTunes to the ones from the other person's iTunes or vice versa. You can use your apple ID on someone else's iTunes, but I don't suggest it.
you need to create an apple acount to get an apple ID, then you use the ID to get the music, videos, apps, etc. Hope this helped! =D
how can you delete an itunes gift card if you enterd the code if apple Id does not work
You can remove in store credit from your Apple ID, and move it to another account. You can gift the amount from your iTunes account. If you find that you cannot, you can contact the iTunes help page, and they can help you move it.