12. Is there any way for me to "test drive" a telescope?
Yes. Look in your area for an astronomy club, and visit one of its meetings. You'll find others who enjoy astronomy as much as you and are willing to share information and views through their telescopes. At one of the club's public or members-only stargazing sessions, you'll be able to look through many different telescopes in a short period of time.
13. Apart from quality optics, what's the most important thing in a telescope system?
The mount. You can buy the finest optics on the planet, but if you put them on an undersized or poor-quality mount, you won’t be happy with your system. No telescope can function in high winds, but a poor mount will transfer vibrations in a light breeze. The mount’s quality also affects the “damp-down” time. This is the interval between when you touch the scope (to focus, for example) and when the image in the eyepiece stops moving. Sturdy mounts reduce this to a second or two. Bad mounts increase this time to an intolerable length. Mount quality is one more reason to “try before you buy.”
14. Is a "go-to" scope better than one without go-to?
Yes. Once properly set up, a go-to scope (actually, it's the telescope's drive that's go-to) will save you lots of time by moving under internal computer control to any object you select. It's important, however, that you understand how to set up your scope, and that will require you to identify a few bright stars. Use a star chart to make this step easier. Even experienced observers prefer go-to scopes because they make star-hopping to deep-sky objects a thing of the past (when star-hopping, an observer locates a bright star and proceeds to ever-fainter stars until the target is located).