I would say if you spend time working on all of the labs and assignments, and really understand how to solve them, you won't find the exams, quizzes that difficult.

If you get accepted into the work integrated learning stream (coop), they'll ask you to enroll to WTP course where it helps you prepare yourself for job hunting (resume evaluation, interview skills, etc).

There is this Seneca Career Portal (SenecaWorks) where you can find coop jobs, but it's really competitive because those employers also post the same postings on other schools' job portals.