oooh, how exciting!
What breed are they?
Check you've got the basics... hay, straw,
food, treats (ours love bananas!) (maybe ask the place they're from to give you some - they don't like sudden diet changes)
antiseptic spray & emergency 1st aid stuff
collars/halters & leads if you need them, might also help tell them apart at first!
milk pails, pans, bottles, spoons etc
a good strong bolt, padlock, chain whatever on the doors and gates!!
in time.... hoof trimmers (we use secateurs), brushes, combs,
record & medicine book - write everything down, cos you'll soon forget!
Camera & batteries