Those wheels will not fit... IF they do not rub on the caliper you'd be looking like a truck... the wheels would poke out from the fender line...
Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com
The calculator you shared assumes (wrongly) that the OE size determines the size of the brake calipers/rotors, which is rather strange. We'd need to be able to input those metrics to know for sure. While I wasn't able to find out whether the ZR/Auris JDM specs had matching brake rotor/caliper specs as our iM, I know 16s fit... But do *all* 16s fit?
Being in the purchasing process myself, I'm aware of a few things.
Toyota OEM steelies of 16" can be obtained from your dealership and installed, no questions asked (our own heated seat man has those). So already the conflict issue brought up by the calculator is dismissed.
You have more than two inches of clearance between the caliper and the wheel at the front. Remove 1" in diameter and you got that much play. It seems the potential for problems emanates from the wheel weights.
With that said, a few brands and suppliers have already confirmed compatibility (and guarantee fitment). For instance, 1010Tires, a company which has a policy of issuing full refunds on guaranteed fitment wheel/tire combos (buy at your own risk otherwise) guarantees fitment of the following wheels so far:
16x7 Enkei Compe
16x7 Enkei BR7
16x7 Enkei CUV
16x7 Enkei EDR9
16x7 Enkei FD-05
16x7.5 Enkei GP5
16x7 Enkei GT7
16x7 Enkei J10
16x7 Enkei M52
16x7 Enkei PSR5
16x7 Enkei RSF5
16x7 Enkei VR5
16x7 ENkei YS5
16x7.5 Helo 874
16x7 Helo 880
16x7 Helo 884
16x7 Helo 885
These manufacturers (Helo and Enkei respectively, so far) have actually done test fitting on the iM and are able to confirm they fit which allows 1010Tires to guarantee fitment.
16"s are possible. Are they *all* possible? No, but expect more and more options to "clear up" in the near future.