Really, the only tools you NEED to start with are jars, lids, rings, and a big pot. You can do all sorts of things, from jams to pickles with nothing more than that.
A canning funnel is really handy, as is a lid lifter, but neither is absolutely necessary. And I never use a jar lifter - I have tongs with silicone covered ends and I just use those. And then whatever ladle you have on hand.
The Ball canning book is considered to be THE canning "bible", but I was canning for years before I ever got it. I started with jams, and honestly, that's one of the easiest things to start with (that or pickles). I prefer using Pomona's Universal pectin over the other big names just because of how it works... regular pectin relies on the chemical balance of acid and sugar to gel, but Pomona's doesn't. So I can sweeten my jams to taste instead of having to use a TON of white sugar in them. Vinegar-pack pickles are also really easy because of the acid being used. I've never made cucumber pickles myself, but beet pickles are a fave, and I have a drawer full of asparagus in there for making asparagus pickles this weekend.
Definitely shop around locally for sources of canning jars - you don't want to pay shipping. And tell everybody you know that you need canning jars, you'll be surprised how many turn up. Any more, if I'm buying something in a jar and I have to decide between 2 brands, all other things equal, I buy the one that has a jar I can reuse for canning (BBQ sauce, spaghetti sauce, pickles, mayos, jams, etc.). Now that so many companies are moving into plastics, it's more difficult, but you can still accumulate a nice stash that way. I know one of our local hardware stores carries them year-round as does the local mega-CVS. Even the grocery store carries them, but that's the expensive place to get them. You can also check freecycle and/or CL for them. Once you've done it a few times and feel comfortable with it, you can explore whether you want to move into the more involved things like pressure-canning - I wouldn't start off there though.