The first step is to register your copy of TRS19 (registering is free) and that will give you access to 100,000s of free downloadable content and we will know that you are a genuine owner of TRS19. There is a Register link at the top of this page.
Normally, to place a train on the track you would have to be in Surveyor, open the Train Tool (bottom icon on the right screen margin), select a loco, click the + button and click on the track. It would also help if we knew exactly what route you had loaded.