Yo CAN use the Cox glow plug clip... I don't recommend it. That's about the most inconvenient glow plug clip short of using 2 aligator clips.

There's quite a range of batteris that will work. Anything from a single C cell alkaline to one of th appx 9 inch tall 3 inch dia "telephone" (old hand crank-ringer phones used 2 of them) dry cells will work. The C cell alkaline will give about 10 engine starts. (If the engine is not hard to start...)

What I recommend is to get one of th C size NiCd "Glow Ignitor" kits which includes a charger. These can hold enogh power to start the engine a bunch of times. (whcn flying a LOT I charge mine once a month) Its a bit expensive initially, but it'll save n the long run vs disposable bateries. Also, the glow ignitor doesn't have wires to get caught in the prop while you are starting the engine.

You REALLY do need to contact a local modeler and get help.... Not even knoing what battery to use for starting the engines, you don't know enough to safely start th engine an you won't know how to adjust it.