The hotel is on Hurontario Street (which runs north-south) which has a bus service. It connects with the GO transit train system which will take you into Union Station in downtown Toronto. Bus plus train would take you at least an hour to get into the city. There are plans in the works to build an LRT along Hurontario but, assuming that it isn't cancelled, it is still several years away from completion. The bus along Hurontario will also take you to Square One (a large mall in Mississauga) in about 10 minutes where there is a GO Bus station where you can also take the bus into Toronto.
The hotel website says free parking.