Regular oil should be changed every 3,000 miles, synthetic oil every 5,000 miles. Be proactive about checking your oil; once a month is good maintenance practice. Your vehicle may require more frequent oil change and maintenance services when the car is subject to more rigorous and server driving conditions.
The tire pressure should always be set to the tire manufacturer's suggest PSI (pounds per square inch) pressure specs. The specs can be found on the side of your tire. Properly inflated tires will give you better gas mileage, tire wear, and overall handling of your vehicle.
Checking the anti-freeze as well as all other fluids is very important for proper vehicle maintenance. Once a month is good practice.
It's best to refer to the owner's manual provided by the manufacturer for exact mileage details. Timing belts are made of rubber and should be considered a regularly scheduled maintenance item. It is wise to have a professional mechanic inspect your timing belts.
It is possible but not too likely, unless the light is flashing. Just don't put it off for too long. The car is warning you that something may be in need of repair.