2. Is there a list of Canned Message freely available that I can copy from?
No there isn't but you can add you own canned responses in Admin -> Canned Messages -> Add
4. How would I know when a visitor has come to my website? Is there some kind of automatic alert?
Yes. There are different alerts for different functions. You hear different sounds depending on what has happened, ie: a visitor has entered your website, a visitor has entered a hotpage, a visitor has requested a chat session, etc.
5. I thought coBrowse & coForm means I am able to view in real-time, the navigation path of a visitor. Am I mistaken?
If you're mistaken, then I am too.
Questions 1, 6 & your end comment have still to be investigated. I'll update when I know more.
Hope this helps.