Mass-produced road cars from Toyota won't be featured in Forza Motorsport 7, according to a report by AR12 Gaming.
As stated in the article, an array of Toyota production cars won't be present in Forza Motorsport 7. At time of writing, the closest example of a road-legal Toyota in Forza Motorsport 7 is the Arctic Trucks-modified Toyota Hilux from the most recent 'Garage Update' announcement.
It's also unknown at time of writing how this will affect the inclusion of production cars from Lexus (the premium sister brand to Toyota) in Forza Motorsport 7. With no Lexus road cars included in the aforementioned JDM-themed 'Garage Update', it's highly likely Forza Motorsport 7 won't contain any Lexus production cars either.
However, sanctioned racing cars from Toyota will still be featured in Forza Motorsport 7. As a result, it's highly likely the Toyota racing cars from Forza Motorsport 6 will be carried over.
With NASCAR content already confirmed for Forza Motorsport 7, it's presumed at least one of the eight Toyota Camry stock cars from Forza Motorsport 6's NASCAR Expansion will also be re-used in Forza Motorsport 7.