You should be fine on the battery for 10 years as it is backed by Toyota for that long. Well, at least the 06 era Prius are. It isn't the miles that kill batteries, but rather age as well as temperature. Hot climates kill batteries prematurely unless they have cooling systems. The Prius unfortunately does not have one really, outside of your A/C.
As long as you change your oil and filters, as well as your transaxle oil, you shouldn't really see any issues. Oh and I think there was a water-pump something or other that was a recall on them, not sure if your model year was included. You can go to look up recalls by VIN. Sorry I forgot the URL, but a quick Google search will yield the answer should you want it.
I have an 06 with about 107K on the odometer. Battery went bye-bye last year, on the 10 year mark, so outside of factory warranty. It would have been prorated anyways, so not really too helpful since I did not go to a stealership.
You can also go check out Prius Chat, it's a forum for Prius owners full of great info.