get an iron from the salvation army or something but make sure it's not a newer iron with holes in the bottom, it has to be solid metal or else you're fucked. then get some toko all around wax, it's white, cheap, big, and works for all snow temps. get a big scraper and a nylon brush and in order just:
-heat your iron-rub the wax on your skis without heating-hold the iron over your skis and melt the wax on the iron and let it drip onto your skis, don't put too much wax on, keep a steady line- go from tip to tail-starting from the tip put the iron down and slowly move it towards the tail. DO NOT go too slow or leave the iron not moving on your ski, it will burn your base-after you've spread out the wax then wait at least an hour-after an hour scrape from tip to tail and try to get as much wax off as you can-then brush, take like 5 strokes with a hard nylon brush tip to tail again-scrape again after you brush to get all the wax off-if you invested in a horsehair brush as well, do that as much as you can and scrape after you're done
those are simple steps, if you're doing race skis you want to use a copper brush before you do anything and you need a hard brush and a soft brush for the final brushing. you also want temperature specific wax. everyone has different methods for doing it, that's pretty much what i do