the car has been having trouble starting for a while as well as sending me a check engine lite so i went to auto zone to get a code reader and when i plugged it in the first code said manufacturer controlled air fuel meetering and the other one said misfire in cylinder #1. also the car has something wrong with the heater it only works sometimes and it uses coolant and i can't find the leak i was thinking a headgasket but there are no other sighns please help.

sounds like it needs a new MAFS, possible tune up related to a faulty MAFS, and it could have a heater core leak but you should get it pressure tested to be sure. the intermittent heat is from the coolant leak.