What does a tune up on a 95 buick lesaber consist of and how much will it cost?

My check engin light keeps coming on.My oil lite is on i have a small oil leak. The engin sounds like it is reving when im at a lite. Or it will stall out.What does a tune up on a 95 buick lesaber consist of and how much will it cost?a tune up consists of replacing plugs, wires, and air filter most of the time. you should definatly check how much oil you have. could eighther be low on oil or your oil pump is out ( very expensive fix) or your sensor for the oil is out. check and see if your maf( mass airflow sensor) is dirty or not and if its eighther working. you can test your maf by unplugging it while the car is running, if there is no change or it actually runs better after unpluging then that ur problem. (relitively cheap fix, much cheaper if you do it on your own)