It would be a good idea to start with a reloading manual like Lyman"s 6th Edition Shotshell Reloading Handbook. It has good info and tables on shotshell reloading. The Ballistic Products Advantages manual has good info as well. Most of the Ballistic Products load data revolves around the european wads they sell which are good.
I don't believe the domstic brands Remington, Federal and Winchester are producing wads anymore...The Claybuster CB5050-410HS has become the standard easy load economy 2.5" 1/2oz lead shot wad in Lyman's 6th edition loadbook. You might come across some of the discontinued name brand wads here and there if you look around for them gunshows, Ebay etc..
Powders are Lil'Gun, 2400, 4100, H110, Alliant 410, and Win 296. There's also a handful of 3" 11/16oz loads with IMR-4227.
The 600Jr Mark V is good and is less $$$, but if you can spring for the Sizemaster as it has the sizing collet on the press. If you're loading for different guns it's worth the extra $$$, but you should be able to get by just fine with the 600 Jr.
ETA:
I was was wrong on atleast two of the domestic brands of wads. Federal and Winchester are still producing .410 wads.