having had a look at the original post in C&V, the first question (which I can't see as having been answered) is, does it fit? if not, walk away now. (from your height given @5'7" and the tiny frame, think it maybe too small)

From the look of the bike, it has some old and basic parts, you haven't said what your end game for the bike is, but as it looks, would try to avoid taking anything apart if it is currently working, as you may break parts which will need to be replaced (especially as you don't have the tools, and are looking at a cheap/zero budget)

For your specific questions -

1 - Park Tool website/Google, ask on here for specifics? For what to take apart -see above, if it ain't broke...

2 - Bikes are almost all metric, what are your car tools? from the look of the bike, you can do a lot of it with a metric spanner/socket set and a set of hex keys. Some specific tools will be needed for the BB/headset/Cones/freehub (although think is probably has a freewheel), see Q3

3 - Yes, no, maybe. As the bike is old (early 90's ish) things like hex keys are standard, if you need specific tools for just about anything else, it won't be usable on a 2016/7 bike as standards have changed many times since the 90's

Would budget(cost) everything you can with that bike, as thinking it could be come a money pit as you are starting with no tools/limited knowledge.