there is crankcase ventilation system in your car's engine
if the valve is bad or choked it may also be the cause of this excessive oil consumption
assuming that you have the 1KR engine
this valve is fit on the valve cover near the engine oil cap
remove that valve carefully without damaging the rubber grommet.. blow some air from both sides one by one... if good it should block some air on one side and completely block on the other.
you can also shake the valve and listen for clicking inside the valve.. if nothing clicks it's probably dirty and gummed up inside