There is oil leaking from the bottom and I just starting using the FTX Buzzsaw ?

The light oily/greasy covering to the outside of the model is completely normal. Oil filled shock absorbers are not installed on this model so therefore this residue is coming from the model’s main gearbox. This isn’t a sealed unit and during the model’s first uses, a small amount of grease may leak from this area as the model warms up. This can easily be wiped away with a cloth and after some more use, will eventually stop.