No, to use the shower, you'll likely need a bar of soap and a towel! And for the toilet, perhaps some toilet paper.
But seriously, you will need some way to get water into your water system, either by filling the fresh water tank, or hooking up to "city water" with a hose. I'd go to the nearest RV dealer and buy a nice, white fresh water hose and get water to the coach. And then figure out if your propane tanks are full - didn't the dealer tell you? - if you don't know, you can find out at a propane vendor by weighing them.
That's about all you need. Once I had this part down, then if I were you, I'd plug the coach into "shore power" in my driveway, stock the fridge with some adult beverages, turn it on, and go out and read the manual(s) that came with the machine, while enjoying a cold one. Or two.
OR: tow it to the nearest Forum rally, confess ignorance and people will come swarming to assist you (that's what I did, and I learned more in a couple of hours than I would have thought possible!). Airstreamers are by and large very nice, helpful folks!