LS1 5.7 engine problems

Question

Engine smokes a white/blue color with a lot of soot in both tail pipes and smells of raw gas, plugs keep fouling, idles and runs really rough and not on all 8 cylinders as the power is not all there! These are the codes I get on an actron AutoScanner Plus...C0237, C0050, C0240, P0101, P0102, P0122, P0500, P1122, Also hard to push shifter over to reverse but goes up into it fine!