You're not permanently planning to uninstall it, right? Are you trying to fix a botched upgrade, or 'downgrade' to an earlier version? I'd just download it from Apple's website and reinstall it.
Why do you want to get rid of iTunes? Getting rid of apps, with the exception of some preference files (and in this case the iTunes library) simply involves dragging the app out of the Applications folder and into the Trash. It will require deleting as an admin, or an admin's password.