What should I buy for riding?

I am riding more often now and I need to get a helmet, breeches, half chaps, and maybe boots (i already have a pair of paddock boots) im not going to show, so this will just be for hanging around the barn, lesson riding. i've been saving up, but i just started so it cant be too expensive. also, do they have like beginner bundles (includes helmet,shoes)?? thanks