Welcome to the forums.  :) A while back, we've collected some startup items in a thread. I was writing this one. http://captainsim.org/yabb2/YaBB.pl?num=1286115031/47#47 Maybe it helps on the first steps.

Regarding e.g. the fuel distribution and things, there's another thread. http://captainsim.org/yabb2/YaBB.pl?num=1299898971/5#5 I think most 707 stuff got already explained in one way or the other, so mind the search feature if you are looking for specifics. But you can always ask of course.