2004 nissan sentra white smoke from engine then radiator busts

I just got 2004 nissan sentra had been setting up for about year now. I was told at the time only thing that could be wrong with it was the cam shaft position sensor, and possibly the catalytic converter, so eager to know if the engine was worth time and effort. I put a battery pack on it jumped it and it fired right off. Idaled well but when giving it gas (reving the engine it seemed to cut out and lose power) moving on from problem 1, I then cranked the car to let it warm up to drive it home so i stepped away from the vehicle while it was running for a bit only to come out and see white smoke from engine. I immediately killed the car noticed the temp gauge was running hot. And then the plastic on top the radiator just exploded. What causes that? And what should I do for troubleshooting after I replace the radiator tomorrow… I need help peoples on knowing what to do.