Its been years that my friend has been growing Jathropa in our desert town of Jaipur. He got the technology from Israel, one of the best places to learn about the plant. The seeds are sold for about USD60 per KG and are used to make aviation grade fuel. The rest of the plant is like a plant. I am not a farmer but I know that mustard oil can be used to light lamps and that vegetable oil can be used in furnaces after processing chemically.
Jathropa and bio diesel (made from sugarcane) are being tested to power vehicles because they are cleaner fuels and can help protect the environment, because they do not leave any heavy water, nuclear waste or ocean bed unstabilities behind. The projects are being funded by the Government of India and the IITs.
If anyone needs more information on this, I will try to find out and pass it on.