Public Transit Directions:
TTC Subway to St. Andrew Station (on the Yongue-University-Spadina line)
From St. Andrew take the 504
LRT (Streetcar) to the intersection of King St. W and John Street.
Walk South on John Street (if you pass Wellington, you're going in the right direction, but if you pass Pearl St. you're going in the wrong direction).
Turn left on Front Street and keep walking until you reach the convention center.
Now navigating in the MTCC itself is another issue.
Fares and prices for the TTC (the transit system you will likely be riding) visit: