where can I have a DVD converted from UK format to Canadian format, preferrably but not necessarily in Toronto

Answer 1

This is easy.

There are several stores on Yonge Street near Dundas that do it, but it is probably more convenient, and likely cheaper, for you to visit a south Asian (Indian or Pakistani) video store.

There are LOTS of them in and around Toronto and DVD format conversions in either direction are a big part of their business.