The absolute minimum anyone should have in avalanche terrain is a beacon, shovel and probe. An avalanche airbag is a excellent addition that can save your life. All of these items can be bought on backcountry.com.

Anngela, please consider taking some classes as well! I agree Sandy, Beacon, probe, shovel and a pack are essential, ava airbag is an excellent edition as well. Education is a key, know how to use your gear and where and when to go!