I just got laid off from Tim Horton's for shortage of work after 13 years of service, while they still have employees with less time worked and student workers, is this right?

While your employer can layoff and/or terminate you, they must provide you with a fair severance package. I would strongly suggest that you visit the severance pay calculator our firm has developed to see what you are owed (www.SeverancePayClaculator.com). I would also encourage you to call us and set up a free and confidential consultation with one of our employment lawyers who will be able to further asses your matter.