Where can I find the model number of my toro 6 hp briggs mower
And which way do I turn the nut on the flywheel to remove it?

Hi,
Counter-clockwise for the nut.
Model number on engine is rivetted tag, or above plug or above muffler. Model of mower itself on rear of frame either facing up or back, or under operator panel near top of handle.
Peace,
Clarke