Yes, a chicken stick is a stick used for starting an engine. And while some folks will say that it needs to be made out of some high tech materials, basically anything from a broken prop to a screwdriver will work (I use a piece of 1/2" copper plumbing pipe wrapped in duct tape). The term comes from that days when flipping the prop with your fingers was the usual method of starting the engine. After a few cuts, bruises, and stitches, several people got smart and stopped using their fingers and used a stick instead, for which they were labeled "Chicken".

As far as what fuel to use, again, everyone will have their opinion. I say use whichever gives your engine the best overall run (full bore, mid-range, idle). I use Cool Power 15% because I have found that it works very well in ALL of my engines (2 and 4 stroke).