my lincoln MKT 2010 that I bought used about 1 month ago made a clicking noise inside the car. Then the car would not drive it loss pressure. It barely made it home. If flashed across the scream loss of pressure.
So I will just guess. You bought a ten year old vehicle with unknown thousands of miles. Failed to check or change the oil. Had noise from somewhere, more likely from the engine than inside the car.
If you chose to drive it without oil, your engine is now toast.
It said loss of pressure or low oil pressure? Low oil pressure is not a good message to see. Especially if it screams.