The LED bar is a rather simplified version of putting 10 LEDs on your breadboard. The LED bar contains 10 different LEDs that require their own GPIO pins.

each button should be wired the same way, just to different pins. each button needs a 3.3v ran through a 10Kohm resistor and a ground wire, with a final wire with a 10kohm resistor to a gpio pin. Within wiringpi, the pin must be set to input mode.