"...both semi-auto and bolt guns..." Semi's require full length resizing every time. Bolt actions can be neck sized. It's not a bad idea to use different brands of brass for each. However, if you plan on using the same brass in both rifles(lots of shooters do that), you'll have to FL resize when you load for one or the other anyway.
Carbide sizer die and taper crimping only for your 9mm and .45.
What you load first depends on what you shoot most. If you don't have a manual, buy one and read it. They have a how-to chapter.