It depends on what its had over the last few services mate.
Engine wise, you can change:
Oil filter
Oil (obviously lol)
Air filter
Spark plugs - plenham off job, not hard but fiddly if you not done it before - dont do the plenham bolts up tight!
Fuel filter - this originally wasnt required for about 150k, but my new Renualt service book (I ran out of stamp places in my old one) suggests its changed earlier, so its worth changing.
But remember, the rest of the car needs checking for example:
Brakes - for wear
Suspension - for leaks and general wear and tear. damage etc
Exhaust - check for blowing, broken rubgers etc
Coolant sysytem - check for leaks, damage etc
Thats a general idea mate.