All schools have some type of centre devoted to international students.
This may be one person in a single small room, or it may be a whole building with classrooms, lounges and many people working there. Alternately, it may be a student-run club with few resources other than a comprehensive network of contacts. At every school at least one support staff will be dedicated to assisting internationals and giving advice about procedures relating to the Canadian or provincial governments or university administration. In any case, these centres will help you to no end practically once you arrive in Canada, plus they will give you a place to meet people and make friends. These centres publish their own international student handbooks, some which are available to be downloaded off the web, while others will be sent to you by mail.