My car does not start properly

What is your question?

My 1997 Saturn SL1 will not start properly. I have to step on the accelerator to get it to start and now that is barely working. When I give it gas, I have to press the accelerator down to the floor and sometimes that does not work. When I do this, white stinky smoke fills the air. Also, my friend recently changed my spark plugs to find out that the motor oil was in the old spark plugs. I don't know what kind of engine I have.