Not totally sure if the pump needs replacing, the second video I posted was just the noise of the pump (I kept the camera cap on the lense).
I am aware that the auto fill/pressure reduction valve is one in the same besides all of the other problems < I think this is the cause of the no pressure problem. I'm pretty sure it's stuck closed - per this thread's advice.
The boiler drain does have a cap on it. It's not leaking now, I'm guessing due to lack of pressure in the system.
The auto vents are of the No. 67 type. These can be cleaned? The one on the radiator is pretty corroded and the Schrader valve didn't pop back up at first. I know the price on them is pretty low.