No, the subway doesn't run out to the airport, at least not yet. There is a bus service to the downtown area, run by Pacific Western coach lines (not the local city buses, which can get you to the subway, but that's rather lengthy and not worth the hassle). The PWC buses depart regularly from all terminals for the downtown area, and end up at the Royal York hotel, downtown, and will make a few stops at nearby hotels if requested. About a 40 minute trip downtown, traffic permitting, and more reasonable then a cab or limo.

You won't need a car for a quick visit to TO, as the subway system, and "underground city" will get you to most places in the downtown area.

PM me if I can be of help with more info.

bj-21.