To me, she sounds like a nice parts car...and that's about it.

That valve cover crack could be due ot a massive amount of blow-by that overwhelmed the crankcase ventilation system; did you pull the oil cap while the engine was running to see how much came out?

The structural thing may have to do with the steering. I've heard of others talking about the subframe cracking at that point due to unexpected pressure put on the steering gearbox, which is mounted in the vicinity.

The hood may be adjustable, depending on why it's crooked. However, the question I gotta ask here is why is there body damage? If the car was in an accident and wasn't properly repaired, there could be other issues that aren't visible or haven't manifested themselves yet. Actually, that crack could be another symptom, as could that rub in the driver's door.

Obviously, it's your decision but I'd be concerned about the front end...

Good luck!