no
Anything purchased from the iTunes store, as from any other store, can be kept forever.
The iTunes software is free. You only have to pay for any music you download and keep from the iTunes store.
No. Your iTunes Store balance will remain on your account, but you should update the email address associated with your iTunes account to keep your info up-to-date.
iTunes is software that manages and plays your music files on your computer; you do not need an iPod to use iTunes. You only need an account if you wish to buy things from the iTunes store that is built in to the iTunes software. You can buy music from the store to play on your computer; you do not need an iPod to buy things from the iTunes store. If you have an iPod you use the iTunes software to manage the music you want on your iPod and to keep the iPod's software up to date. (See links below)
If you want to keep a copy of a movie you should buy a copy. Copying rented movies is illegal.
When you go in on the itunes store it should say at the top how much you have left on the itunes gift card. you spend it by buying stuff(songs, videos, etc.) and the ammount should be deducted from your gift card.
The iTunes store is an online music retail store. You need to pay for any music you want to download and keep.
Keep a master file of all your music in a separate folder. Copy and paste the music you want into the iTunes library, you can use iTunes to sync to your device and create playlists. When adding new music be sure to place the new music into the master file first then copy to iTunes.
After you've bought the app, you cannot retrieve the money you spent on the app. iTunes acts like a 'no refund policy' store, where when you buy it, you keep it and no returns or refunds are accepted.
You can still keep the same iTunes account.
uncheck them in your itunes then sync your ipod. Then they should be on your itunes but not your ipod.