what different scales could i jam with for like a rolling stone? and in what key?
Ah, thanks LedHed. I've been learning this song as well, this will help a bit.

Oh, still need the key, though. C (minor), maybe?
C major, innit? C, Dm, Em, F, G for verses, C F G for the chorus, and something involving F and G for the prechorus. At least, that's the way I used to play it.
(Slightly outdated) Electronic and classical compositions by m'self: Check 'em out