By default, Mavericks has a text replacement for the copyright symbol in the form of the three character sequence: (c). You can see this in System Preferences > Keyboard > Text. In Pages, you will need:
Edit > Substitutions > Text Replacement enabled for this to work.
I realize that your photo is of an older keyboard that pre-dated the flat, aluminum one on which I now type. The sequence for copyright is first the option key, followed by g. Just checking.
You can also direct-inject the copyright symbol from the Special Characters palette (control+command+space). This will be in the Letterlike Symbols, or Letterlike Symbols - All categories in the Special Characters gear selector > Customize List… > Symbols. Position your cursor where you want it in the document, and then double-click (or drag/drop) the copyright sign in Special Characters. It will appear in your document.