24qt ss pot will be good for "partial boils" - you basically make a really strong, small batch and add water afterward.
A keggle is a 15.5 gallon sanke keg (bud, miller light, keg party keg) with the top cut out, it basically makes a 15 gallon SS pot that's 1/8" thick for around $40 (a normal pot that size would cost $500+) There are tons of threads on here about how to go about cutting the hole, I used an angle grinder and it was really easy. You can even polish the crap out of them like BobbyM at BargainFittings and look at your face while you brew
I'd just get the basic beginners kit, it has enough of the small stuff that you need without spending the $ on stuff you don't.. there's nothing wrong with fermenting in buckets, and once you've got a couple of batches in, and more reading, you'll know exactly what you'll want to upgrade.
I built a counterflow chiller from some instructions I found on here, and it took a couple of hours, but only cost about $40.. I think they're far superior to immersion chillers. When I started, I didn't want to pony up the cash and "no-chilled" (there's a few threads to read more on here somewhere) It works pretty well, but I wouldn't go back !
Just read a lot on here, order a kit you like, and give it a shot !
Let me know how it goes !