If his son were to forgo college like his father and enter the league at the age of eighteen and play with his father, LeBron would be thirty-eight. But I think the NBA changed their rules so that coming straight out of high school is no longer an option, so for them to play together, LeBron would be pushing forty.
Yep, he'd have to go to college for one year.
unless he goes to Europe next year. Then he'd be eligible for the NBA draft the following year.