Have a 1995 Subaru Legacy that slammed into a deep hole with water. Gas tank has a dent and exhaust was damaged. The car runs but smokes and does not run on all cylinders. Have changed the spark plugs and is getting fuel but not much. What else can I look for to get this to run?

Optional Information:
1995 Subaru legacy

Already Tried:
changed spark plugs checked fuel lines and wires to make sure nothing was disconnected