If they. cop a plea, they won't go to jail. There will be plenty of indictments, with lots of evidence to back them up. Trump might too stubborn to know when to cut his losses.
I'm sure his lawyers will recommend that he negotiate. I don't think either side wants to have a trial. Will he listen? Probably not.
Will they really charge everyone involved, even those in Congress? Well, they are over 900 already, what's 150 more?