First of all, if you ask ten homebrewers a question, you’ll get fifteen answers, most of them right, depending.
So, here’s my set of advice:
If your basement temp gets over 75 in the spring/summer, brew Belgian ales. If it goes below 60 in the winter, but not low enough for true lager (below 50), brew California Lagers. If it goes cold enough for true lager, what the heck part of Wisconsin do you live in, and have you ever heard of insulation???
Williams Brewing is a good source; you can also check out my local brew shop. I’ve brewed most of their kits and have never had a bad batch of beer.
Leinies = good beer. If you’re happy with Leinies, you’ll be ecstatic about homebrew.
For the extra water you pour your wort into, you can use bottled water rather than sterilize it; I use Kandiyohi. If it says “spring water,” that means “we pumped it out of the ground.” Kandiyohi is steam-distilled, then they add minerals for flavor that happen to be the same minerals you need in your beer. I’m assuming, since it’s steam-distilled, that it’s at least as sterile as any part of my brewing process. I usually buy two 2.5 gallon bottles for the main boil, and two 1 gallon bottles for topping up after–one I leave at room temperature, the other goes in the fridge in case the wort’s still a little hot after I take it out of the icewater bath.
If your starter kit uses a plastic bucket for the primary fermenter, expect your first batch or two to taste like a plastic bucket. You can soak them overnight with a baking soda solution in them to take some of the taste out, but still. Plastic. Oh, yikes. I just checked the link–plastic primary and secondary. Definitely, baking soda will be your friend.
You will also eventually want to pick up a jet bottle washer, and maybe a bottle drying tree.