My answer to the 15th riddle is chance
"I've got some top quality stuff for sale if you're interested. I bet you could use it if you plan on taking down any of them frogs."
―Chance
The clang is the money needed to buy his wares, the bang is/are the top quality wares he provides. His name is chance, comething that entices almost everyone which, is why most previous posted the lottery man.