All Ninjas use Chakra, to perform Special Moves such asTaijutsu (only hand to hand combat), Ninjutsu, Genjutsu and Bloodline Limit jutsu. These Special Moves are created with Hand Sings (along with chakra) which is gained through experience and your spiritual energy, if you can combine these two with just the right amount of energy, you have the upper chance of defeating your enermy. You must know how to do it, or you will die!
Here is a movie of almost all Jutsus and Hand Seals:
NOTE: Some of this Info is gathered from other Sites, and other info is from myself. The pictures are from www.freewebs.com/narutofansiteno1.
Chakra is Generated withing the Body of a Ninja, using Phisycal and Spiritual Energy. Then, when enugh Chakra is Molded together, the user Performs some Hand-Seals to make a Jutsu. There are three forms of Fighting witch require Chakra, and one Additional Form witch doesn't require Chakra, but does requires a lot of Stamina and Training. The Forms that DO use Chakra, are Called Ninjuts, witch is used to perform Jutsus, Genjutsu, witch is used to perform other Special Jutsus and Bloodline Limit Jutsu, witch requires the most Chakra, but is the Most powerfull as this Form is used to Make the Strongest form of Jutsus. And, now for the Extra Form, called Taijutsu. Taijutsu is in fact the Only Form of Fighting witch does not need any Chakra to be Performed. Just like Lee shows in the Show.
And, for Performing a Normal Jutsu, the Exact right amount of Chakra is needed, if you don't use the Right amount of Chakra, it can result in a Poorly Executed Jutsu;
Chakra is the resulting form of energy when 2 other energies are mixed together, having those other 2 energies become more powerful, will in-turn make the Chakra more powerful.











