Does each beginner game box come with the same starter characters? Mine only came with Pash, Vex, Oskara and The Wookie. I've seen some people playing with a Technician? Are there more pre-made characters for the game, or are these games that are using additional custom characters?

There is two more you can print the pdf for. It is under the support section

http://www.fantasyflightgames.com/edge_minisite_sec.asp?eidm=224&esem=4