On the left side of the helicopter where the muffler is situated the throttle is too.If you're looking at the heli at the left side of the heli and the tail is to your right, then if you push the throttle lever all the way to the left you have full throttle so you should have the lever just a couple degrees from the right open and that should be enough to idle.
I took my main blades off when testing the engine but you must not rev the engine for long and not high either or else you'll overheat the engine.It's safer than leaving the main blades on but if you want to give it full throttle then you should leave the blades on.
An when you start the heli you can prime it by opening the throttle fully and then put your finger on the exhaust muffler exit for a two seconds whilst you put the starter on but don't have the glow driver on at this point.Then close to idle and put the glow driver on and he should fire.The main needle valve should be about 1 and 1/2 turns open and bottom end should be about two turns open but I suggest you leave it where it set at the moment and only change main needle.
The most important thing when starting the heli is make sure you're holding the main rotors by the yoke and that you can close the throttle quickly if the heli revs too high when you start it or you could possibly break the clutch.