How to build a complet circuit with the following led in left and the following circuit in the right?
This circuit is a driver for the LED. The transistor will be working in the saturation region to turn on the LED (switch on 5v) and in the cutoff region (switch on 0v) to turn off the LED. Try the following:


For the voltage you may use a cellphone charger.
Use a little button for the switch.
RB may be 10k ohm to give enough current to the base of the transistor.
RC may be 1k ohm so your led won't blow off.


Then assemble the whole thing in a protoboard.
Also, I recommend you to read BJT theory and make circuits, lots of circuits, not only in theory but make them physically. Good luck.