Battle Star Galactica that is.

So can someone 'splain to me a few things?

1) The whole who did what and where. So the "first" humans were on which planet? (Cobol or Caprica)? And they build cylons who then built the "skin jobs" and then they left (the skin jobs) as the 13th colony? I'm confused on that whole timeline after last week's episode.

2) They made mention that there were 8 models + the 5. And I think it was the brain dead one that mentioned that each model had "one" person that only they could see? So that would seem to indicate that Baltar is the #7? But then the other final five said that "daniel" was an artist ...