There is a similar question in the specialty section under PACU nursing with some good suggestions.
PAR's can really vary.
A busy OR that does major trauma, neuro, cardiac, pediatric, surgeries would be a whole different world and knowledge base required by the PAR nurse versus an OR that only does scheduled, routine, basically, "healthy" patient surgeries (no emergency surgeries), no pediatric, none of the things I mentioned.
If it is a major trauma busy, OR, you will be hanging a lot of blood rapidly, managing cardiac drips, managing intubated patients, etc.
Even "stable" orthopedic recovery nursing requires some specialized knowledge of braces, ice thingies, CPM machines ( I don't do much orthopedics). Orthopedics isn't hard, just different equipment you need to get used to.
You need to ask why type of surgeries. Will ACLS and PALS be required. Is staff required to be on call. If so, get in writing what their on call rotation, schedule is. Insist that you get orientation to being on call.