What comes in the box depends upon whether you buy used or new. If you buy new, there are options for what to buy with your switch and whether it's pre-wired for non-derail operation. EDIT [The latter option also requires a relay, such as the Z-Stuff DZ-1008. See follow-up reply below.]
Ross also sells custom foam roadbed for each type of switch. I would encourage you to explore the Ross and Z-Stuff websites.
Maybe start here> http://rossswitches.com/switches.aspx
If you still have unanswered product questions, you could email: steve@rossswitches.com