1997 Bonneville SE Won't start

[bonneman]

I got into my car and moved it in the yard and everthing was fine until it acted rough when I accelerated. I looked at my gauges and I noticed that the check engine light was on. So I parked it and cut it off and let it sit for a few hours. I went back out later to start the car and the check engine light was still on and there was gray smoke exherted from the tail pipe. I cut the car off and restarted and it would not even start. I checked the battery which was about 12.1 voltz. I noticed the fluids were all about dry to the bone and the oil was quite low. When I turn the key on without starting I can hear the fuel pump fine with no hesitation. After everytime trying to start the car there is a reek of gas. I just recently changed the speed sensor, so I guess problems are just going to start rolling now. Anyone got an idea?