Complex sentence: Because it was the most modern, and in the best repair, The TTC continued to use the Lansdowne Carhouse far longer than its other legacy facilities, and used it as the first facility to store its new Peter Witt streetcars.
Split into simpler sentences: Because it was the most modern, and in the best repair, The TTC continued to use the Lansdowne Carhouse far longer than its other legacy facilities. It was the first facility to store its new Peter Witt streetcars.