1)Don't know
2)Yes, but you don't want to try and get them, you WILL die!
3)I don't think so
4)Sure, do a search
5)No
6)Multiclassed get to choose which stronghold they want. Dual classed get the stronghold of their current class
7)Yes, trigger them with a character that has high HP
8)The bard stronghold I believe is the 'playhouse' in the docks district. You get to 'manage' the playhouse...don't know how it compares to others?
9)check out this link
http://www.candlekeep.com/library/articles/alaundo.htm
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Never try to teach a pig to sing; it wastes your time and it annoys the pig