Help Please

Ok so start car and it is hard to start a little. Then it starts and shakes back and forth. Engine kicks back and forth. Acts like its getting gas then its not then gettting and then not. Sits there and sputters. Just put new plugs and wires. Pulled the wires all out and nothing they were clean but the very last one to the right the whole wire broke in the middle of the plug. Beat the cat with a hammer cause I noticed wheni start it and run it for a second smoke/gas will come out from the headers where they connect to the downpipe.

Its not running on all cylinders. Which means atleast one of them isnt getting a spark. Replace the damaged wire, and check all other wires to make sure they are okay and on tight.

They were all on tight till i tried to pull them off and the last one was on there and stuck and it just ripped in half.