Check Fuses # 28 and #30 in the engine bay fuse block. They supply power for the Left headlight, High and Low Beam.
Is the car burning oil or leaking oil?
An oil change won't solve the problem if you are losing oil.
To prevent further damage to the engine ensure that the engine oil level is always at the correct level on the engine oil dipstick until you can get the problem fixed. Check the level when the engine is cold. If oil needs to be added do not overfill.
If it is burning oil there are problems in the engine itself. Check for blue smoke coming from the exhaust pipe when the engine is running. Depending on how much oil is lost will give an indication of the severity of the problem, (check the oil dipstick regularly -every time you fill with gas perhaps until you get to know the loss rate). Do not let the oil level drop below the Low mark on the dipstick as it may cause more damage to the engine. Take it to a reputable mechanic for advice.
You will know if it is leaking oil as there should be tell tale signs in the engine bay (and possibly on the ground beneath the engine when you are parked) of fresh oil on the outside of the engine somewhere. (Oil belongs on the inside of the engine). Again take it to a reputable mechanic for advice