Right-click anywhere on the toolbar area, either on a toolbar itself or in the unused portion of the toolbar space.  You’ll be presented with a context menu of all available toolbars.  Click on any toolbar to have it appear.

Note that all buttons may be disabled (as shown in the picture) if you are not in the right "environment context," meaning that you don’t have the right window or editor or designer showing to enable the buttons (hence why it was probably hidden to begin with). 

But play, experiment, and see if this helps.