C.P.
You will love Taos, that is our hot spot for winter and summer! You'll find the locals there to be very friendly and everyone is so relaxed. And Taos Ski Valley is great! That mountain is nice because they don;t allow snow boarding there (only in Angel Fire), so I never have to get worried about being run over or getting in anyones way. I think I'm more worried about being in other people's way more than anything! :-)
For clothes, ask friends like one of the moms suggested. Ebay, craigslist. Sun & Ski Sports at Grapevine Mills has a big selection and usually good sales. Mountain Sports in Arlington.
Good luck finding what you need! They'll need a pair of thick socks to wear under their ski boots and maybe a shirt two to layer under their bibs and jacket. I learned not to wear two pairs of thin socks together because it just traps in the moisture and your feet freeze, doesn't feel so good when the toes go numb! They may need ski goggles, hats of course, and gloves.
Have a great trip!! If yall make it out to dinner while in Taos, I suggest The Old Blinking Light and Michael's Kitchen. And if you and your husband enjoy beer, there is a brewery called Eske's. It's family friendly, a small little place. Good food and good beers.
-Char