I agree you'll probably have to spend some time restoring it. Sending the mirror off to be recoated is the first thing I'd do, then spend that time replacing bolts that have rusted or corroded. Check the counterweight and the dec shaft for rust spots as well. The drive is probably okay if it runs, but may need new cork for the clutch. You can find that at the hardware store as well.

I've never been one for restoring to original condition, so on my RV-6 I replaced the focuser with a Crayford, and put in a RACI Orion finder. That makes it much easier to use. Here's a picture of my restored RV-6 from 1968 vintage.