By default, when you install the developer tools from developer.windowsphone.com, there is no other Built-in applications except on Internet Explorer application.
If you want to experience the full set like the following simulator.
All you need is download a customized image from http://forum.xda-developers.com/showthread.php?t=784523
or simply search WM70C1.en-US.bin
then copy the images to C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.0\Emulation\Images
then when you click run in visual studio, you will get the image as shown above.