No,you shall have to download itunes again
yes, if you had those songs on your itunes they should still be there when you log onto your itunes account
No. You need QuickTime in order to run iTunes.
Yes after install it is un needed
Yes. It would be like buying a shirt, wearing it, and then returning it. If you already bought it, they charge you.
Yes, if you buy a used iPod Touch, it still works with iTunes.
If it does not open, try restarting your computer. If it still does not open, delete that iTunes and redownload iTunes 9 from Apple's website.
Yes.
I suggest you reinstall ur iTunes, and then reset ur iTunes account password to see if you can log into itunes. If it still doesn't work. You can create a new iTunes account. Hope it helps.
Try reinstalling Itunes I had a similar problem and tried everything: unauthorizing the computer, logging off the account, deleting the SW files in the Itune folder - nothing worked However, when I installed the latest version of Itunes, it started working normally.
uninstall itunes and reinstall the whole thing ur music will still be there heres the download link: http://www.apple.com/itunes/download/
When installing a new version of iTunes only the iTunes software is updated your library is not touched.