On the Bulletin Board in the Tower after you get through some of the story you will find this side-quest. The aim of it is for you to collect lighter gas for Toygar - so it is a simple fetch and scrounge quest.
You need to search the town for five (x5) Lighter Gas.
Toygar is standing next to the Bulletin Board - simply approach him and hand in the resources to complete the side-quest and collect your reward and points - and a new Blueprint for Grill 'Em and Kill 'Em!