I believe in minimalist reloading to start -- others do not -
a lyman reloading manual or other manual - i prefer lyman
Modern 45/70 as opposed to trapdoor ?
A press of some sort -- lee hand press -
2 or three die set -
balance scale
bottle of case lube -
primers, powder, bullets -
rag to dampen with solvent to remove lube --
That is about all you NEED - All the other stuff makes it easier or quicker --
Lots of good used tooling out there --
Others may disagree and insist you spend a couple hundred bucks or more to get started --
When I first got into reloading I spent hours watching YouTube and learned alot. I learned alot of folks do it just a little different here and there and you will have your own also.
The best start is to get a Lee - Modern Reloading Second Edition by Richard Lee / Everything About Reloading with World's Most Comprehensive Load Data. Then read it before you buy any tools. The 45-70 is easy to load for and you can load it to hunt anything that walks. I suggest a Lee Single stage press with lee dies, a scale, lee hand primer and the extras as much as you want to buy.
This is what you want.
Not very fast but produce excellent boolits.
I have them in several calibers (NOT 45-70) and that's what I
use target and long range boolits.