The minimum requirements for admission to the University and to the Faculty of Science are found here. If you are a high school student who is interested in studying physics we'd suggest that you make the most of your high school preparation. By that we mean taking more courses than the minimum requirements for admission. Admission to university is not the destination and it makes sense to get the best preparation to be successful not just in university but in your future career. We suggest completing as many of the following courses (in addition to the minimum admission requirements) as makes sense for your future plans.
Calculus 12 (if it is offered by your school)
Chemistry 12 (most physics programs require first year chemistry)
Biology 12 (particularly for students interested in biophysics programs)
Computer Science 12 (coding is an increasingly important skill for physics students)
Students who do not complete these subjects may need to complete an additional university course to make up for the deficiency. For example, if you need to take first-year chemistry (CHEM 121) and you do not complete Chemistry 12, you will need to first complete CHEM 111. The same is true for Biology 12 and Computer Science 1.
There are a lot of great books about physics and we'd recommend those listed below for the interested student.
Genius: The Life and Science of Richard Feynman, by James Gleick
A Brief History of Time, by Stephen Hawking
A Short History of Nearly Everything, by Bill Bryson
Longitude, by Dava Sobel
Galileo's Daughter: A Historical Memoir of Science, Faith, and Love, by Dava Sobel
Cosmos, by Carl Sagan
Astrophysics for People in a Hurry, by Neil deGrasse Tyson
The Fabric of the Cosmos: Space, Time, and the Texture of Reality, by Brian Greene
Cosmology for the Curious, by Delia Perlov and Alexander Vilenkin
The Cosmic Landscape, by Leonard Susskind
QED: The Strange Theory of Light and Matter, by Richard Feynman