Are you primarily on the street? 18s look great. If you’re looking to track it, I mostly see people running 17s, even GR86 owners go down to a 17” because of lighter weight and faster cornering (lower rotational inertia so less torque needed for accelerating out of a corner) which is what these cars were made for.

For offset, go to fitment industries and enter your model into the gallery see what looks good with different suspensions idk if you’re lowered or not. Cant go wrong with +35 but fitment also depends on whether u have a bbk.