Found lots of renderings of One Yonge here:
http://www.toronto.ca/planning/loweryongeprecinct/pdf/1-7_yonge_architectural_plans.pdf
Takes a while to load but I found it was worth it.
Found heights of the buildings there.
Tower One: 88 floors 271m
Tower Two: 80 floors 247.4m
Tower Three: 75 floors 232.65m
Tower Four: 80 floors 247.4m
Tower Five: 40 floors 179.2m
Tower Six: 70 floors 221.6m
Toronto Star Building: 35 floors 132.67m
These heights do seems low for the buildings though. On the last page it shows to the top of the mech floor and not the top of the building so some of these will be taller.