You can buy ticket at bus terminal of bay street(close to metro station bay), one way ticket is around cd 70's. Every person is allowed to bring two luggages.You'd better take the first bus in the morning, you will arrive montreal(Metro station berri Quam) around 2 pm.
If you want to buy cheap ticket, you can send to poster at some web site to find somebody can give you a ride.
Good luck.
据我所知,在Toronto城东部的士嘉堡(Scarborough)临近401公路的地方有一个Shopping Mall中心(401公路和McCowan Rd.交口的地方,那个地方的官名好象是叫Scarborogh Town Center),有一个长途Bus的Stop,那里有来Montreal的长途Bus(Greyhound和另外的Bus公司)