that repair is a very common one for a car that saw over 100k miles of police service. Especially if it was driven by a person of substantial stature. I have several cars with that repair done. It is normally caused by the drivier getting in and out over and over and the flex of the stud support over time.
The crack in the floor near the hump is also common do to the subframe design and flexing of the car under hard acceleration.
nothing but wear and tear on the old girl. Don't let it discourage you. I own and have seen/repaired worse.
