Tune-up is a wonderfully vague term. The Haynes manual recommends, for a "minor" tune-up:
- Check all fluids.
- Clean, inspect, and test the battery.
- Check the cooling system. (Clean radiator cap, radiator filler neck, check and top off coolant.)
- Check all hoses.
- Check the air filter.
- Check the serpentine belt.
- Check the PCV valve.
- Replace the spark plugs.
- Inspect the spark plug wires.
And for a "major" tune-up, all of that plus:
- Check the fuel system.
- Replace the air filter.
- Check the EGR system.
- Check the ignition system.
- Check the charging system.
- Replace the spark plug wires, regardless of condition.
- (It doesn't suggest touching the MAF sensor, but I suppose it wouldn't hurt. A bottle of MAF cleaner is the only safe way to clean it, but it shouldn't be too pricey.)
As you just purchased this car, I'd go for the major tune-up, if you have the additional time and money to invest.
My recommendation is to buy a K&N air filter. Take it out and clean it (properly) every year or so, and it should last for the life of the car. It'll also let more air through than a paper filter, which will easily give you a bit more horsepower and miles per gallon.