Welcome to JA.
I need a little more info to help you.
What size engine do you have?
It only had 2.5 qts of oil in the ca when it died?
So when you try to start it up it just clicks and doesnt turn over?
Does it sound like the starter clicking or is it in the engine?
I would try that but if the starter is bad it wouldnt have caused the car to die. Since your oil light came on and then it died it sounds like the engine locked up. If it is locked up the starter could be clicking because it doesnt have enough power to turn the engine over. I would drain the oil to see if it is sludged up and see how it looks. I cant find any info on the location of the starter but if you follow the positive battery cable it should lead you to it. You could try hit it to see if it wil start but if not just be sure before you suspect the engine take it off and take it to the autoparts store and have it tested.
if the engine locked up, any way to free it up?
Before you condemn the engine find the crank pulley where the belt is, it will be the bigger pulley on the center on the bottom and find a socket and ratchet to fit it and try to turn it over by hand to see if it will turn. If not then it is definitely locked up. If it turns it is likely the starter if all of your connections are good. Once it is locked up it is pretty much done. This will happen due to lack of oil pressure if there is not oil getting to the bearing it will seize and ruin the engine.