Periodic maintenance and tuning involves change of air filter + oil filter + mobiloil every 3 month or 3000km whichever earlier. but if your car is not much used you can extend it up to 6 months no more.
If your car has fine idle rpms under 1k without a/c and no jerks, then it requires no further tuning. if there is an issue like rpm drop or high rpms and jerks etc, only then tuning involve carb adjustment in carby cars and computerized tuning in ecu based cars. a device can be installed at exhaust of car to analyze proper ratio of fuel-air or other problems on carby cars.