Congrats on that super find!

as already mentioned, change all the fluids right away, unless service records indicate that was recently done.

then do safety stuff [as required]:

1 brakes - pads, rotors, calipers, fluid
2 suspension - 21 yr old rubber bushings should be replaced, shocks, cracked or broken bits, retourque
3 tires - and alignment
4 wheel bearings - inspect & replace as needed
5 lighting -

then do engine / drive train stuff:

1 tune up [new plugs, wires, dizzy, rotor]
2 engine mounts & tranny mount
3 vacuum hoses & misc seals
4 belts & hoses
5 exhaust, check for leaks

get a Bentley manual....read read read

Have Fun!
John

--
89 245DL M47 300K+mi no rust