If I recall correctly, we got an information packet that covered the fridge, stove, hot water heater, etc..., a remote for the entertainment system, a remote for the tv, a wrench for the stabilizer's, and not too much else "loose". Of course what you get will depend on which of those items your trailer has (ie you may not have a factory tv). Also the dealer gave us a starter kit separately that included a pressure regulator for the water, a hose, a dump hose, a pack of toilet paper, and tabs for dropping into the tank. You're probably not going to get all that, but I mention it because they're all things you should have before going out on your first trip (you didn't mention if this is your first trailer or not, so better to mention it now).
Good luck