is it possible for me to Co-author research paper(s)/article(s) and get it published? I hold a M.Sc. in Finance from UK and currently live in Toronto, Canada. I want to Co-author research paper(s)/article(s) with a professor/PhD academic and get the paper published in good journal. I want to do this on volunteer basis to gain experience of conducting high quality research and publication. Is this possible in Toronto or Canada?
Is this possible? 

Yes, it is possible that one could volunteer to co-author something and find someone who is willing to let you do it with them.

Is this probable or likely in the abstract?

No, it's very unlikely that someone will just take on a co-author who has nothing to offer but their time to the project. What could increase the probability is if you have some thing to contribute to authoring the paper.  For instance, there would need to be some particular feature of your finance knowledge that they lack or would find useful in producing the paper.

Primarily, the issue is that academic researchers in most fields are not looking for apprentices that can watch the research process and then learn how to do research in this way. Instead, they often co-author things with (A) each other by bringing different areas of expertise or (B) graduate students who undertake the research.