Car overheating???not sure

was driving down the interstate the other day and car broke down white smoke started coming from the hood car locked up and shut off...opened the hood and it looked as if it was coming from the coolant container or something from the pipe(tube) i don't know...taking it in to the shop tomorrow but didn't know if it was something small and could be fixable without blowing a ton of money...have put antifreeze and water in it will run fine for a good couple of minutes then just go nuts..PLEASE HELP