I'll do what I can, I lived there for 7 years but have since moved away. Lexington is very nice, I miss it often.
Our concerns are:
1] Tornadoes?

I know after researching the area tornadoes are not previlent, but obviously they do happen. Are smaller ones common?
A] How much does a home owner pay for extra Tornado insurance?
B] Do homes have those under-ground shelters for this contingency?
C] I noticed that some homes advertise "Storm Windows" is this a good thing?
Tornados are pretty rare in central KY, not that they don't happen. Western KY sees a lot more. I don't think you pay extra for "tornado" insurance, it is just part of the coverage. Underground shelters are not common, because they aren't really needed. Storm windows are really for protecting windows from hail and for adding an extra layer of insulation. They are more common on older homes with windows that aren't insulated.
2] List most people not really use to high humidity [average here where we are] we worry that it may be too extreme? Is the super high humidity times just in mid summer mornings or a all-day affair?
Humidity is high. July and August are the only really bad months and it is pretty much all day then. You'll just have to accept that you will sweat if you do anything outside during those months.
3.] When it rains, is it like Florida, with quick short heavy burst, or are we talking all day rains?
Both. You'll get summer thunderstorms that pop up and rain hard for 20 minutes. You'll also have long, steady rain in the late winter and springtime.
4.] Lexington shows a higher than the national average crime rate. Is this more of a downtown issue or does it effect the outer area's too?
Downtown is actually very safe. Most of the crime occurs on the North/Northeast side of town. But just like every city, the middle class burbs will always have a lower crime rate.
5.] If any of you are off or on-road motorcycle/atv enthusiast, let me know if there is a decent dealer network in the area, as well as how is the riding area's. Are there a lot to choose from, or are they being legislated out of existence? I ask this question because I am currently the sales manager of a large multi-line dealership where I live, plus I am a enthuiast too! So this is important to me too.
Can't help here.
6.] I noticed after looking at lots of beautiful homes in the area, that a lot don't have garages. Why is that? I would think that would be a must.
That is surprising. Most newer homes (less than 30 years old) will have garages. The only neighborhoods that I can think of that wouldn't have garages would be the older houses close to downtown in Chevy Chase, Ashland, Gratz Park, South Hill... Anything in the suburbs will have a garage.
7.] I know that the area only get's a light smackling of snow each season, but does a home owner need a snowblower if they have a long driveway?
No, a snowblower would be a waste of money. I don't think I know anyone in Kentucky that owns one.