When accelerating the this almost no power and car shakes

So the car has almost no power when trying to accelerate it, it trembles alot, but once I get it moving it does not tremble anymore. And when it is at a complete stop, it misfires about every ten seconds, just one misfire. if I turn the air conditioner on it misfires even more. so what I did was check the ignition coil, spark plugs are okay. turns out the coil was burned, and I bought another one from the agency, I replaced it, cranked the engine, and now it does not even run at all. I put the old coil back in again and it works, but the engine misfires and trembles a lot. i am lost. I would appreciate the help. thanks