Oil light comes on, steering wheel locks up and the car shuts down what would be the cause of that?

I am assuming you mean you loose power steering when the steering wheel locks up, which would be a normal event if the engine dies. Same goes for the battery light since the alternator would stop charging the battery.
Someone will need to figure out if you are loosing fuel or spark when the engine dies, then troubleshoot the problem. It may be difficult to find if the mechanic can not duplicate the problem in the shop.

Sounds like the low amount of oil caused serious engine damage. It won't be a cheap fix.

I think from what you are saying the wheels are turned enough that they are putting load on the steering wheel. When you get ready to turn the key on - turn steering wheel left or right a little (you will feel which way is hard against lock) enough to get load off lock with your arm strength and then the key should turn fine. This can happen when you parked on hill or had wheel turned when shutting down car.

lets hope its not a bad motor from lack of oil pressure, the loss of brakes and steering is due to the engine stopped running this is normal, but hte oil light coming on with the engine running is not good, you will need to see if the engine spins and trys to start, this will tell you a little bit, if it spins then it didnt lock up, and maybe its a fuelpump or timing belt that let go, you will have to do some testing ,check for fuel pressure and spark at the plugs,

if you turned the steering wheel after shutting off the engine and the steering wheel caught the lock and tried to turn back it would hold pressure against the ignition lock cylinder. if it happens again try pulling the steering wheel hard one way or the other and turn the key at the same time.

Check belt.

Bad ignition coil. Replace.

Clean battery cables and replace bolts. The cam sensor manet will not cause it to cut off.

do the lights still come if so it is not the alternator , it maybe the fuel pump THe steering will lock up when the engine shuts down it needs power from the motor to work

These engines have a sensor known as the Crankshaft position sensor, they are most of the time the part that causes these problems, it is located on the front of the engine, it gets it's signal from the crank pulley/harmonic balancer, if it goes open when hot the engine dies, when the sensor cools back down the eng will restart.