How can i reach Xiling Snow Mountain in a cheap way from Chengdu?

Take a direct bus to the mountain from Chadianzi Bus Station. The buses depart at 9:00 and 9:30, and the fare is CNY 32 per person.

As for skiing, it costs CNY 120 per hour; CNy 200 for two hours; CNY 270 for three hours; CNY 320 for four hours; CNY 400 for a whole day. Have fun!

thank you so much :) is it possible to rent ski boots there?

Yes, you can rent ski boots at the ski resort on the mountain. :)