T.O.B.O.R. (incorrectly spelt as Tobor) works at the Garage in Speedville with Ol' Gabby and Makoto. He will teach you how to build car parts using essences. He will also teach you how to install those parts on your car. He also appears as a racer in the championships and races.
T.O.B.O.R. doesn't give out any missions, he only teaches you how to build and install parts and how to use essences.