Don't worry - you really don't need that much!
For skiing, I normally take two or three long sleeved thermals (or two long sleeved and one short lseeved): you can always rinse one out and leave to dry while you are wearing the other. A couple of jumpers, maybe a couple of long and hsort sleeved T-shirts (it is sometimes surprisingly warm on the slopes!) and a couple of fleeces. That should be plenty. Tesco £4 fleeces should be fine if they are just for layering. (I often go out with 4 layers on, if I am really worried about the cold - easier to take one layer off if you are too hot than go back to get another one if you are too cold - and miserable).
I feel the cold, so I also take a pair of thermal long johns. I also tak e a load of slik socks - personally I find them warmer than thick socks (but it is personal thing). I also have a pair of silk inner gloves. You should alos get osme fleece "turtle necks" - tubes you wear around your neck. Some fleece turtle bands (for your ears) and/or hats wouldn't go amiss either. The latter you can get easily in the resort.
TK Maxx is worth looking at for reasonably priced salopettes and ski jackets. Gloves you might be best leaving until you get to the resort - or go to a good ski shop beofre you go. If you get silk inners, you maybe don't need to spend as much - depends on how badly you feel the cold in your hands (put it this way, even with silk inners, I still spent a fortune on my gloves).
You'll need proper ski sun glasses - again, you can get a good selection in most resorts and they're not ALL expensive! Get a "string" to attach them - to stop you losing them when you fall .
Aprt from the thermlas, I have never found the need to wash the other lyaers: you are so wrapped up anyway!
For evenings, you might want to take a pair of slippers/slipper socks ( an essential in a chalet - but it sounds like you are going to a hotlel)
Just take a few tops and a jumpers and maybe two pairs of trousers for the evenings. You really don't need that much - unoess you are planning on clubbing and going for the apres-ski every night! A cuddly thick jumper is noce to have. Remeber to take "evening" (ie ordinary wool/whatever) gloves. I haven't always had spefically waterporrf boots for the evening - desrt boots or similar are fine.
Where are you going?