First, you have to close off the throttle with your fingers. Then, press down the clutch pedal toward neutral. While holding clutch pedal in the neutral position with your foot, move the parking brake lever to the half-way point to hold the clutch pedal there.
Now you can take your foot off the clutch pedal and press down on the brake pedal to come to a full stop. While the parking brake would engage a pair of small drum brakes on the rear wheels, the brake pedal works by stopping the transmission.
By now, it should be fairly obvious why this control set up didn't last into the modern era. But I'm assured that experienced T drivers can actually handle all of this deftly in an emergency.
NEXT: You have arrived at your destination