-Waterproof pants
-Waterproof jacket
-Goggles
-Waterproof GLOVES --- this is a must
-Waist/belt bag -- can't bring a purse on the slope
The thing that i'm big on are hats... beanies... colorful ones, something fun and funky --- this will probably be the piece that stands out the most since ski clothes are kinda simple.
If you have a good jacket, then you might not have to layer as much because it gets hot sometimes.
Now stores that might have decent stuff----
Nike has some cute ski clothes --- bought a bib there once and i love it!!! it was for snowboarders, but hey skiiers can use it too
Burton --- great stuff, but somewhat over rated... very colorful and loud
Northface makes some great ski jackets that have all the necessities.
beanies --- they are everywhere, it's really what you want to wear.
I'm too scared to wear a scarf... i feel i might choke or something, but that's me. And sometimes it gets soooo cold you might have to get the face mask... but i'm sure if you need it, it'll be easy to get.
Have fun skiing!