whats wrong

What is your question?

i just brought this car and for the first two days it was running smoothly but i notice a crack in the gas tank and later that night the car broke down i igot it towed to a shop and the battery was dead we jumped it and the turned over but it wouldnt stay on unless you smash the gas pedal one guy said it might be the timin belt anther guy said it was a vacum leak ps there is also heavy smoke comin out the muffler and car is idling high and shakin wen foot on the pedal