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Haven't been here in years. My car has been sitting for 2 years just had plug and valve cover gaskets changed. Car is still misfiring(all cylinders) and now A LOT of white smoke was coming out the exhaust. I went to check the oil that i just changed and it was all gone. I checked the oil drain plug and oil filter still on the car. Oil is coming out of the back of the car on the exhaust pipe bends by the rear wheel (big pool on the ground). I was just wondering what this could be. Is it even possible to sell this car for any money? or should i just call a scrap yard.

Thanks in advance.