This white smoke randomly appeared today once I had gotten home from work , I've had the car for about a week & I bought it used. It has 140,000 miles on it & within the week I've had it I haven't had any problems . I bought it knowing that the AC didn't work. The previous owner told me that too much antifreeze was put in and it clogged the Orphian tube or something like that. The temperature was about 3/4 of the way to Hot . I have no idea what is going on , does anyone have a clue ? I checked for leaks and the Antifreeze is leaking, is this going to be costly? When should I be able to drive it??