The air inflator'* for filling up beach balls, and the occasional flat - the attachments.shipped in a bag that came with the cars. Check you trunk, but many times they have been lost in a used car. Dealer can replace it pretty reseasonably.
The air ride should not affect your front suspension in this way, but the indicators do mean some problem or another. The clunking noise is probably CV shaft, brake or bearing related. Does it just clunk once when you back up, or is it a repeating clunk as you continue to move?