I apologise up front if I ramble on or if this isn't the right place for this OR if every one of my questions has already be answered 1,000 times before, but I am kinda in the dark as to where to start so please be gentle.

BACKGROUND: Completely out of the blue, my ex-brother-in-law dumped a rusty Mark V, serial #317956 in front of my garage. I have never used a Shopsmith. I don't know what it is or what it does. But he knows I used to make furniture so he thought it was a good idea and now he's left town so I'm stuck with it. There are some paper manuals and a parts list, most of which I don't understand. It appears to be the standard 500 unit plus the 'Jointer' accessory. It is currently in 'table-saw mode'. I switched it on and the motor does run but I have no idea if it's even safe to use so I haven't taken it any further than that.
I called the Shopsmith support line and the nice lady said she couldn't go into too much detail so she'd have someone call me back. It's been 2 days and that hasn't happened so I figured I'd post here and try to get the ball rolling.
The website says it's circa 1956 which gives me pause. Plus it's missing some items from the piccies in the brochure, eg. the plastic table saw guard and the casters.
So, broadly speaking, how do I determine if it's worth saving?
1. What missing parts are NECESSARY? And what are the costs?
a. Saw guard?
b. Casters?
c. Anything else I don't know I don't know?
2. How do I determine if it's worth saving? And if it's -not- worth saving are there organisations that -would- want it for refurbishment?
3. How do I determine if it's safe?
4. If it's not safe, how do I get it to where it -is- safe?
5. How do I clean it and lubricate it?
6. How do I determine if the motor is OK? Belts? Other gizmos? Can I adjust/replace these myself?
7. What's the simplest way to learn about 'alignment'?
8. I'm in the Seattle-ish area. Are there owners or clubs or dealers in the area that might be able to help?
9. I think I figured out what most of the parts are, but what are these things in the red plastic holder (see image).
Again, sorry for gassing on. I promise to be more brief in the future. I'm as much organising my thoughts about this as anything else. If I were 30 years younger I'm sure I could figure it all out from the web site, but frankly I don't have =time= to go through all this stuff. Also, (get out the tiny violins) I'm on disability so I don't have much money. In short: if it works with minimal cost? GREAT! I'd love to have a lathe. If it's going to be a 'restoration project'? I'd rather not deal with it. Anyhoo,ANY help kickstarting this process would be most welcome.
I attached 2 files. One is a sideview. The other is a red plastic holder I can't identify.
TIA,
---JC