Door lock hopefully isn't the pump in the trunk having been submerged in water. Wouldn't surprise me. Do the doors work with the button on the interior?
I would pull the Styrofoam in the trunk under the mat just to see what it looks like under there then punch out the grommet just in case it ever leaks in there and also see if the central locking module has any signs of corrosion in there.

Seats, I would bet is just the relay behind the driver side a/c vent. They always fail. Cheap to replace and quick, too.