Headlight Switch problems of the 1997 Chevrolet Cavalier

As I was going to turn the switch on to turn on my car it didn't want to start. I had some one fix it but could not find a way to fix it. They had to add a button under the steering wheel to start the car as I turn the switch on. There was couple a of times where the car would go on passlock by itself and wouldn't start until a long period of waiting. The external headlights burn constantly and I would buy new bulbs for the back lights. One time our neighbor said he heard noise like fireworks on our property and he said that he seen our car was sparking light out of the steering wheel. That morning of that day he told us and as we were checking the car I could smell something burned. As a result of that the car didn't want to start . The auto repair people had to come to our house to figure out what was wrong with it. They had told me that some wires inside the steering wheel had burned but moslty I have been fixing more of electrical switches and burned wires. I appreciate for taking your time to read this and I'm looking forward to hear from you.