the swix system is designed with racing in mind. so it can get very technical, and it involves some very expensive waxes (some ceraF powders can run over $100 a bottle).
that said, you don't need most of that stuff...ch wax is basically all you'll ever need. essentially swix colors its waxes by snow (or outdoor) temperature. So you'll use a yellow wax when its really warm, a green when its really cold, and the rest shake out in-between. they're all marked by temp at which you should you them, so thats pretty self explanitory.
the different classes of waxes (CH, LF, HF, HFBD) are for different humidity and snow conditions. Basically, as it gets more humid, and the snow is older, you want to move from CH to LF to HF to HFBD waxes accordingly. This is a little less scientific, and has more to do with a touch that you develop over time for what wax to use.
That said, you dont need to worry about HF and HFBD. I will generally only use an HF or HFBD when I'm waxing for a race, and I need every hundredth of a second. What I'd adviuse is you use CH for most days, following the temperature guidelines on the wax boxes. You may want to invest in some LF waxes (LF12 is an assortment pack that will give you a little bit of three different ones) for days when the snow is really old or dirty. Other than that, just use CH.
Hope that helps. There are some wax freaks out there who spend three hours every night cleaning their bases, applying different wax cycles, brushing, applying ceraF powders (which are 100% fluorocarbon)...it can get really involved. As long as you're cleaning, waxing, scraping, and brushing every few days, your bases will stay in great shape.