Take a look at this topic regarding pillar trims What is this missing piece of interior trim next to dash?
If the trim and fresh air nozzle (and tubing) is missing then either fresh air is being blown in to the footwells, or more likely the outlets on the heater box have also been blanked off.
Search on here for “oil pressure” but normally it’s 40psi when running and 15 to 20 at idle (hot). It could have an high pressure pump fitted, which is not really desirable for a road engine. Once again, search “high pressure pump”, there’s plenty of discussion on that topic.
Mike