Here are some things that need to be replaced/inspected if they haven't already been done:
replace engine oil, every 7,500 - $8 do it yourself
replace engine oil filter, every 15,000 - $4 do it yourself
replace air cleaner element, every 30,000 - $13 do it yourself
replace spark plugs, every 30,000 - $16 do it yourself
replace engine coolant, every 45,000 - $8 do it yourself
check tires inflation
replace timing belt and water pump, every 100,000 - $100 do it yourself
replace transmission fluid, every 90,000 - $4 do it yourself
inspect front/rear brakes, every 15,000, replace worn out brake pads for $50 do it yourself
rotate tires, every 7,500
Costs may double, triple, or more when you bring it to a shop to have done.
Good luck!