To completely destroy the guild, type in the chat edit-box "/gdisband" without the quotes. This will wipe the member list clean, destroy the bank (mailing all the contents to the gm), and delete the guild permanently.
Hunter's do not get a class specific mount. They use the same mounts as everyone else. The only classes that have their own mounts are: Warlocks, Paladins, and Death Knights. Druids get a spell to...
Yes, as the owner you are all the a member of the guild. Your level of rank however is at the highest point, so you would be considered an administrator or moderator for your guild.
Doing quests, dailies, and running instances is a decent way to get guild rep. The amount of guild rep you can get is capped on a daily basis and also depends on your level, and how much rep you get...