well, see if you can get a Lee Load all press,they're cheap and work really good. then you need your shot,primers,wads and empty shells of course, and powder. The Lee Load all comes with several shot and powder bushings to choose from for different loads. You should pick up some loading data as well. Keep in mind each brand of shell may require a slight load change from the other.
I have been reloading ammo for years now, both shotgun and rifle.My Lee Load all press has given me several years of great service with no problems. I use RCBS equipment for all my metallic loading.
I think even at today's prices,this would all be under $200.00.