Last year I had a vehicle, and was able to get out of town to work 3 days on a farm
This year, no vehicle but would like to farm again, will transit, car pool, whatever it takes
So if you know of any opportunities I'm in the North York area and will have at least 2 days a week - will volunteer to learn also :)
Check out AgCareers.com they may have some positions...
You might also visit a farmers' market and talk to the vendors who may be able to help you out.
Also I think www.farmstart.com has some activities in Toronto.