*A water bucket for the stall, a small trough for water out in her paddock.....or a second bucket.
* A bale of grass hay to start with. (Our feed stores sell hay.)
*A bag of 14% grain...I agree with Barefootin in asking the previous owners what they were feeding.
* A feed dish for the grain is nice, but you can also just put the grain on top of her hay pile.
* A salt block....We use a salt/mineral block which has selenium in it because we are in a low selenium area. (Your vet will tell you if you are.)
* A halter and lead....You'll eventually find a use for a second lead. (A harness is only used for cart driving.)
*Curry comb, body brush, mane & tail comb, and hoof pick.
* Bedding on a dirt floor is optional, but I would recommend it....We use a pine bedding.
* PDZ or Stall Dry......This is a product I highly recommend, even if you don't use bedding. It soaks up urine and cuts the smell.
* A small rake and snow shovel to rake up poop.......and if you don't have a spare wheel barrow, you'll need it.
* Wormer......The previous owners can tell you what her worming schedule is......Once she foals, she's going to need Ivermectin.