I started out with a RCBS rockchucker kit, which at the time, was a grand total of $265 after the mail-in rebate. Has everything you need to get started.
I still use the same press and priming tool, but as I've gone down the rabbit hole, I've upgraded some of my gear to make it easier on myself.
45-70 is a great round to reload for, and can be very economical to shoot this way. YouTube has lots of good videos, the book "ABCs of Reloading" is another valuable source.
As some have mentioned, Hornady Leverevolution ammo has cut down brass that is shorter than standard brass to fit the FTX projectiles. I load FTX for hunting, so it doesn't bother me too much.
Take your time loading up the first batch, don't feel too bad messing up a couple cases getting the hang of things when setting your dies.
If you can find a buddy, local CGNer, or range member to show you the ropes it'll go a long way to help de-mystify things for you.
After you get going, have fun! It's an addictive hobby and another way in which to enjoy shooting/hunting in the comfort of your home.