To unlock train driving mode, bring up the train window for one of your trains. Make sure the train is completely stopped (red flag icon) and that the train window is the topmost window on the display. Then, hold [Insert] while typing driver, then release [Insert]. If you access the stop/go menu on the trains flag icon, you will see a new third option in the menu called "Manual" (Screenshot). Select the "Manual" option and the window will change to show a slider control that allows you to control the train. When the slider is at the lowest position, the brakes are fully on. The half way position means the brakes are fully off but no power is applied. The highest position is for maximum power. Start driving your train after making sure it is facing in the correct direction and be careful so you do not drive it off the end of the track. Then, use the mouse pointer to move the control slider up to release the brakes and apply power.
-When first starting, start small (for example, a bus route or tram). They may produce low income at the start, but a low income is better than none.
-Don't build too fast. Avoid a two track system until you have a good income.
-Trains aren't smart and will take the fastest route to its destination, even if it means going into a dead end. To avoid this, build overhead wires to go to your other station and use trains that needs overhead wires.