Engine knocking pretty bad

When I got this car it was fine. Then I notice the engine rumbling side to side motion pretty bad. In the area where the carb is there was a vacuum leak noise, but I fixed that. I knew it needed spark plug changing so I did also the wires, cap and rotor too. During this process of changing I mixed up the wires which that pretty much messed the firing order up too. So I tried till I figured this out, which lead to the carb having a mist like smoke come out, misfiring occurring, and even the where the valve cover has that tube that connects to the intake/ air cleaner barrel like thing that has the air filter inside it that all together just covers the carb itself completely. Well any way it had flames come out that tube connected to the valve cover. But I figured out a way to make this all stop and get the car running too, with no problems. Wait a second dont forget I had to figure this out without even checking the correct firing order until now. Then I tired the correct order and that surprising the way it says in the book did not work it actually failed the engine completely and I could not figure out why so I hooked it back up the way I had it myself because that started the car obviously. The car was fine for a second or two of starting and running and moving and everything but then it started to knock when I started it up and had it in park. When I put it drive or any other gear other than park and neutral there was no noise. Even when it drove so figured it wasnt that bad until it got got louder and louder in park. So I checked the oil which it said full. But as I was checking that oil I notice a light bit of smoke that smelled like something burning maybe oil, etc im can really describe this smell. This smoke was coming from the left side of the engine. As the car stay on longer the smoke got bigger and bigger it was still kinda light smoke though. When I check the spark plugs it didnt make a difference so I dont know why there is smoke and why the engine is knocking. Also this knocking got even worst when you start the car and put it in any gear too moving or not no matter what. There is also black dust like sand looking stuff coming out the exhaust pipe going all over the ground leaving a black oily puddle everywhere. Also somewhere between me starting and reeving up the engine it shooting black smoke out these pipes too. I CAN NOT START MY CAR OR DO NOTHING better yet let me tell something else the gas needle went to empty in which this gas has been burning really bad too. But look there is now 3 gallons of gas that I just recently put in the car and it still does nothing but turn over and try to come on a little but then the battery goes dead and I have to keep it on the charger to even get the engine to rotate properly in which it will only come on if my foot is all the way down on the pedal. The engine comes on for a second making a very very loud knocking noise which it also only stays on when im reving it up still because if I take my foot oof the pedal it turns off completely and I go through this same process over and over OVER OVER OVER OVER OVER WHAT IS THE PROBLEM PLEASE HELP ME!