the original train station was where the cn tower now sits, there was a baggage handling “shed” that was added subsequently that ran east/west south of where epcor tower now sits and there was a two story annex that ran east/west between the station and the old post office.You can see the exposed parkade of CN Tower I believe...trying to imagine where the train station/tracks were.
as noted, cn tower was built where the station originally sat and its parkade actually sat over/around the ends of the shed and the annex. a new station was incorporated in the basement and there was a tunnel under the tracks that provided access to the boarding platform.
the tunnel and the east annex were demolished for the first phase of station lands along with a small building on 101 street that was once home to the cn police and was the first permanent home for ihuman. the shed was demolished to make way for the galleria.