I live in BC, Canada, and am setting up my own business due to great stress and unhappiness with my employer, I provide professional and personal services, and some clients that I service at my place of work are also friends. I am giving in my notice of resignation soon, and want to know what my soon to be former employer can legally do to me if I tell clients where I am going. I have not signed any non-compete agreements, nor any other such documents. Am I bound under any obligation?
Please help, any advice will be appreciated.

Since you have signed no such non-compete clause, then you have no legal obligation once you leave. You may then compete against your former employer.