Edges: side guide, bottom guide (fixed angles or adjustable angles...I prefer fixed angles for both guides), 6" second cut file, medium grit diamond or abrasive stone. Felt tip pen (ink the edges, then just remove enough steel to get the edges sharp and remove the ink...remove no more steel than necessary).
Base: Don't worry about it. Let the shop fill gouges at the annual shop tune. Very carefully cut away any raised bits. Do have the shop promptly weld in new base material if it is gouged through to the core.
Wax: Any iron. Ebay has some decent cheapos. I like Hertel Super Hot Sauce universal wax. I dribble the melted wax on from the iron's sole, iron the wax into the base, re-melt the wax and wipe it off with a paper towel. Ski. It'll be slow for the first 10' or so, then ski fine. No real need for scrapers & brushes. If you do scrape, wiping the excess off with the paper towel greatly reduces the mess.
This is a very minimalist way to maintain skis, and it has worked to my satisfaction for years. You can get more exotic waxes, scrape, brush, brush some more, but for rec skiing the benefit is tiny. You can do a lot to the bases and spend money on devices, some times good work, sometimes damaging work, but again, I can't feel a difference. If you want to spend more, buy or make vises. There are lots of DIY ski vise designs around the internet. I hold the brakes back with the rubber bands off broccoli or asparagus.
