Out of Storage Maintenance

I just picked up a '93 GSL with only 45k miles on it, all original. It's been sitting in a garage in California and has been only been driven 200 miles in the past four years. I'm selling my old car and making this my DD. What initial maintenance should I perform to ensure it has a long life?

So far I've changed the oil/oil filter. In addition I was thinking I should change the air filter, fuel filter, engine coolant, and spark plugs?

I should probably do the timing belt/water pump as well but I would need a mechanic for that and don't have the money right now..

What parts of the car do you guys know to breakdown over time and I should consider replacing?

Sounds like you pretty much have it covered. Fuel, ignition systems, fluids, filters etc. I would recommend doing the TB/WP as soon as possible. It may not have many miles but the fact that it is likely rather old will also create a failure point. Otherwise you should be good to drive.

The car sounds like quite a time capsule. Have any images?

Thanks