1)&)5 Knight makes a nice brass volume measure and a really nice range rod with a bore guide. Its expensive but very nice. I weigh my charges on a scale but only because its convenient.
2) Ive used almost entirely Win209s but those are in the NFPJ conversion plugs. Not the new NFPJ bolt. If they function the same, i see no reason to use mag primers in that plug.
3)If the bore was as loose as my Extreme 50 i would NOT use a Harvester Crushrib. The plain Harvester short black or MMP HPH-24 would be as loose as i would go. Using longer bullets mostly in the MMP sabot.
4)I use nothing but Warnes but there are plenty of good bases. If you like Warnes MidwayUsa has them in silver finish steel. Ive never seen a Talley for DISCs but i haven't looked.
5)See answer #1
6)Whichever centerfire solvent you prefer with BH209. Pull the plug and run a dry patch through first to remove the majority before using any solvent.
7)I use the CVA starter kit with several tips. Its cheap and fits lots of bullets as long as they don't require a special loading jag. Some bullets with long poly tips can get damaged.
Hmmm bullets bullets bullets. Start with something good enough for hunting and affordable so it doesn't cost you a fortune to get used to the gun.
250gr and 300gr Speer GoldDots/Deepcurls/UniCors are a good start until you want to spend a buck a bullet.

Nosler 45cal Partitions at
www.wideners.com if you want to scoop up some premium class bullets at half price might be worth considering too.