A year ago same thing happened to me (2002 WRX -- sliding on snow in an empty parking lot, slid right into the curb). I may have been going 18 - 25 (ish) mph. In addition to trashing one tire/rim and denting the lip of a second rim, here is the damage list:
1. r/f lower control arm bent
2. r/f sway bar end link bent
3. right side lower cradle bent
4. right rear (from when the rear end hit after the front) camber barely out of spec as a result of a slightly bent rear strut.
I fixed the r/f tire/rim and items 1-3 at a dealer -- total cost about $1,600, parts and labor. I have been living with #4 unfixed because it is just barely out of spec and I plan on upgrading the suspension completely this summer. Hope this helps.
2002 Blue WRX, Vishnu Stage 0