HELP

Own a 92 celica gt was driving home and went to turn this corner and it hesitated to turn then my car started smoking pulled over turned car off the oil cap had came off car and had oil on top of my engine so i thought i ran out of oil but when the car cooled down i checked it and it had oil so i didnt put any in went to start it and it has a big knocking noise now what could it be had ppl tell me that its the bearings and had someone tell me its the valve i bent. Someone please help banghead