white smokes usually a sign of a headgasket. u say if u push start it itll start all the time? if so, its your starter. if the car doesnt crank at all and your lights and horn dont work its your battery. where u live is it cold? if so the white smoke can also be condensation, when a car is cold all cars smoke on startup, and the smoke is white.

just use some fuel treatment and see if that cures the problem if u think its a fuel delivery problem.