Help please

I'm going to Colorado. To a ski resort. I've never skiied or been to a ski resort. I don't know if I'll do much skiing, quite frankly, but part of me thinks, "What if?". But I don't know what I have to pack. I have no idea at all. Should I buy cheap ski/snow pants? They might have rental, but I doubt the pants parts are rentable. Should I just buy when I get there? I have no idea what I'm doing and I'm leaving in like three days. Please help if you have some sort of expertise in this situation.