This has been asked several times in the past, so Technical guys will be fed up, and will not answer this, so I will.
Engine oil and filter change.
Air filter, if required.
Diesel Fuel filter.
Possibly brake pads and discs, if required.
ATF and filter if never been changed before.
Cabin air filter.
Diff oil, if not already done.
Check all suspension and steering joints, inc ball joints.
Plus any other worn or time replacement item.
What have I missed ?