Assume the worse and guess the previous owner got rid as it needed the belts doing. The age dictates it needs doing even though it is low miles.
Check the clutch mechanism from master to slave to mounting bracket. Mine is high on the pedal but not sure if it is the replacement system fitted that still needs fettling or the clutch telling me it is time!
The discs will clean up but that'll depend on how bad they are under that rust! Run it for a couple of miles, clean off and check.
Change for aero blades.