I would echo Dillon as a good choice. Have two Sq Deal B's, one set up for large primers, one for small.
Buy a RELOADING MANUAL!!! They are cheap insurance and will give you a wealth of info. That said, you will need a scale to measure your powder charges--or at least when you set them on the Dillon. Of course you will have powder, primers and bullets--the consumables.
Didn't say if you had brass. Dillon sells it or sometimes you can buy it from the ranges for dirt cheap prices. I have a tumbler, media and a seperator to clean the brass--very important.
While not required a few loading blocks in which to put the clean brass and I spray them at this time with a sizing lube, again Dillon sells this. Another place to look for odds and ends is
www.midwayusa.com. While they handle other reloading machines they do have reloading supplies. Compare prices with Dillon.
A primer flip tray is needed to fill the primer tubes on the Dillon, some spare tubes are also nice. Low powder sensor is a nice to have item. Other nice to have's: plastic boxes for the reloaded bullets (I place them in these point down and can check to see all primers are fully seated--if not then back in station #2 at the end to reseat them) , a cartridge gauge to see if the rounds are within specs. A spare parts kit in case you lose something. Dillon will replace but you're not reloading while waiting for the USPS.
'Bout all I do is drop the primers in, add powder, and cycle two or three rounds to let the powder measure fill correctly. From there I'm reloading. When done, pour powder back in orginal container, empty the spent primers and refill primer tubes for next time.
Hope this helps