Starting and Stopping is done on the fly. To start, you have to get on the left side and start pushing the bike forward, then put you left foot on a peg above the rear wheel and swing your right leg up over the seat, all in one smooth motion. Then you get your feet on the pedals and go. Dismounting is done by slowing and sliding your left foot back to the peg as you bring your right leg around to the ground.
The front wheel steers like any other bike. Most bikes had a rod operated brake that rubbed against the tire tread. The brake pad looked like a steel shoehorn. The crank was fixed to the wheel's axle, so you could slow down by pedal resistance, too.