You can find the academic requirements for British Patterned Education here - http://discover.engineering.utoronto.ca/admission-requirements/international-applicants/british-patterned-education/
There is also a supplemental application which partially consists of a video interview. It is very important to do well on the supplemental application.
Your probability of success also depends on which program in the Faculty of Applied Sciences you are applying to. More information is given here: http://discover.engineering.utoronto.ca/apply/admissions-faq/