As for the book, you need more than one.
LoadBooksUSA for the 45-70 is one I’d suggest.
You really need a scale for getting more accurate measurements than the dipper spoon does.
Depending on the firearm used, you may also need the Lee factory crimp die. But this also requires a press.
The reality is, you are going to need more and more stuff as you go along. A dial caliper will become a must.
I’d really suggest starting out with a press kit that fits your budget. Then you can add to it as the need arises. My stuff is a mix from almost every manufacturer.
I just looked, thinking I might get a peek at the load data. It's not recommended for lever guns.If I get a lee-loader kit for the 45-70,what other tools would I need?