If you come by plane, you will arrive at Montreal's international Trudeau Airport.
There are various options to get to Montreal downtown:
The STM (Société de transport de Montréal) is a public transport agency that operates buses and metro (subway train) in Montreal..
The 747 Express bus connects the Trudeau Airport to the central bus terminal (Station Centrale d'Autobus Montréal at Berri-UQAM metro station) with many additional stops at metro stations. The closest stop to McGill is the René-Lévesque/Mansfield stop. Alternatively, from Berri-UQAM you may take the metro or the taxi (~12$) to reach McGill.
Bus stops near McGill:
Types of tickets:
Montreal also has a bicycle share system with service points all over downtown. Basic price for 24 hour access is 7$ (15$ for 72 hours). Any rides less than 30 min. are free. See https://montreal.bixi.com for details.
Canada, like the USA, has a 110-120 Volts (50 Hz) power supply system with North American outlet sockets. If you come from abroad, you may want to bring an adapter for your laptop.