Ok, so I bought my MityVac ($25 at AutoZone) and I hooked it up to the nipple that the brown and blue line hooks up to the shutoff valve in the back of the injection pump. It didn't hold any vacuum at all. My car has oil dripping in the dash and I bet it's working all the way around the stereo area and more so 1 thing at a time though. When the weather was colder, sometimes the car would take several (5-30 seconds) to shut off, but now it never has that problem. But the oil is definitely in the line, big time. So it would seem like the shut off valve needs to be replaced, and yes I've read about to be very careful when replacing it so as to not have runaway engine problems which would ensure that my engine is trashed in the driveway.

Here's my questions,
1) Did I do the test right?
2) If I get one of those little filters to catch stuff like this earlier in the future, how do I connect them since the vacuum lines are so tiny and the filters are at least 1/4 inch?
3) Where exactly is the brake booster so I can see if the oil has gone there? What does it look like?
4) There is this yellow plastic thing on the back of the IP. Is the valve inside this (i.e. it's a plastic housing)? If so, do I need to take off all the screws, or are some of those for adjustments and I don't want to mess with them?
5) How do I access the key switch area and behind the climate control area? I already have the kick panel off, and the oil in that area is terrible, but how can I get into that side wall on the driver's side to clean in there?
6) while I'm in there, the heat at driver's feet only doesn't work, can I fix that too? I know there is some kind of servo, but what does it look like?
7) I can't find the detailed vacuum shut off replacement direction by psfred that everyone is raving about, does anyone know where that is? (Yes I've searched many times on this topic) What info I am really missing is how to check the valve once installed before starting engine to ensure the hook is hooked correctly?
8) Since there is so much oil in the keyswitch, I'm worried it may be damaged somehow. What should I look for?

I know that's a lot of questions, but this whole vacuum thing is intimidating me right now. As much info as people feel like sharing would be greatly appreciated. Thank you all!