1995 Chevy S-10 do it myself

I was driving my car at 45mph when car start poping up I move to the side of the road. Put it in parking and motor continue doing pop pop pop so I turn engine off. Few minutes later I try to start it but only I hear the crank. I call a mechanic. Then he told me that the motor dont move. Therefore the engine is gone. I check the car by myself then I found by the mofle oil mix with gasoline, then I open the oil fill cup then I smell gasoline. Also I pull the oil stick I found oil mix with gasoline. Plz i'm broke right now and I will donate next question plz I need help. John jairo.