You can use a 12 volt hobby battery, a car battery, or a motorcycle battery. The fuel used for a glow engine is a combination of alcohol, nitro methane, and lubricants. The per cent rating refers to the nitro methane content. We recommend ten or fifteen per cent for trainer aircraft. With these fuels, you much be sure to run out all the unburned fuel in the engine and treat it with an after-run oil.
Fuel is very expensive to ship because it is listed as a 'hazardous material.
Usually, it is available only in four-gallon quantities because the manufacturers pack them that way in the special containers. To save costs, we recommend you purchase fuel from your local hobby shop. The underscored items below are links to manufacturers' information. More information is being added. Feel free to ask questions about anything stated above in the meantime.