you can set time machine to not backup your system folder. to make it only backup your music, pictures, music add everything to time machine's privacy list except your music, movies, pictures folders in your home folder.
Time Machine is essentially an automated backup and review software. You can see all of the editions of any particular file, and you can use it as a backup method. Perhaps the best part about it is it's ease of use (or apparent ease of use) that will make it stupidly easy for even the most unprepared users to backup their data (about time!).