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Jonny,
My sister moved to Toronto in September and she had jobs lined up.I applied for her jobs, and so did she. We applied for all the jobs that would fit her in Carrierbuilder and monster and also other sites like:
http://www.211toronto.ca/index.jsp
and many more....search on the internet and you will find them. They also have neighbourhood link (named as such) from canadian gov where they help you get trained on how to answer interview questions and make a great resume. You don't have to pay anything. It is a class they give you for free. This is available in canada almost in every city...toronto aswell.
It is just like US, It all depends on how persistant you are to find jobs. Personally what I found is " Toronto doesnot have too many nepalis who explored enough job opportunities. My 2 weeks experience may be short but meeting with people over there made me feel that people who have just come from Nepal have difficulties finding jobs. They settle with lower level jobs but if you have patience, persistancy and some money to survive for 3-4 months without working just to be on safe side, then you can get jobs you want as per your qualification. Market is just like in US. You apply for jobs, they call for interviews, if you prove on interview they offer jobs right away.
Rent and living expenses are expensive for sure in comparison to USA. Regarding jobs I think it all matters in what is your qualification and how good is your resume to catch eyes. Public transportaion is Great. I didnot find Nepalis in Toronto that helpful. Life is fast and it is same like USA except that it is a little too expensive. Goodluck.
Since you have worked in H1B in USA, I don't thibk it will take long for your application. If you pay upfront all teh fees, you maynot even have to go for interview and they will mail your greencard/residency within 6/7 months.
Let me know if you have any questions.