There is a grand total of 64 ships in the rag tag fleet. If we were aiming to get all of them in R1, it would take us ages to do it, which is why every release will introduce a couple more ship types. You will get a few civilian ships in R1, though. You're correct, neither the Valkyrie or the Pegasus will be making an appearance in R1. The idea is to introduce a new battlestar type for every release. R1 battlestar will be the Sobek class Theseus. In the next releases, however, you will see canon battlestars as well - the Valkyrie and the Pegasus will make their appearances soon, with the big G following a bit later.
The Cylon fleet will also grow as we go with releases, there's the zoic basestar you'll get in r1, then the retconned inhouse variant which we'll build later, the guardian basestar, and the TOS style 1st war baseship as seen in Razor. In addition, our concept artists have been working on some of our own Cylon designs to get the diversity the Cylon fleet needs.
As far as I know the Bolitho will be included in R1.