heres some answers for you
1 yes you need a flight pack and switch 4.8 or 6 volts ok more speed and power on the 6 thats all i ever used
2 you will need fuel with at least 15 percent nitro this is the most common you dont need any with a higher nitro you can use 10 percent too
3 its called a glow ingniter you need it to get the glow plug hot to start after that the glow plug will stay lite by it self