Tons of better stuff out there. For your wallet guts, you just need some light weight leather, about 1 - 2 oz. Look for "lining leathers" I prefer Springfield leather for all my stuff and they can help you find exactly what you need in the exact amount you need. Just give them a call and one of the girls there were be able to help you out with whatever you need.
For your dyes, get away from the Tandy Eco-Flo and Super Sheen. Some of the best dyes out there are Fiebing's spirit dyes. I prefer the Professional Oil variety, but there are lots of other options as well. As for your SuperSheen issue, I'm assuming you're attempting to use it as a resist as mentioned in the starter kits. So far I'm really liking Fiebing's Resolene mixed 50/50 with water for that because I can spray it on pretty nicely. It's also a good general top-coat. I actually use ClearLac as well (formerly known as Neatlac), but it just depends on whether I want to spray the finish on or not when I decide which to use.
Also, pick up some scrap bags from whichever place you shop (I still recommend Springfield for everything). You'll see an immediate improvement in your tooling once you get some good leather that hasn't been treated with funky chemicals to preserve it in the box.