No. The ribbon is available in all MS Office 2007 applications.
Documents are not created on the ribbon. You create documents in the application window, located below the menu ribbon. You can create a new document in Office 2007 by clicking on the New option in the Office 2007 menu (a circle icon at the top right of the screen).
Yes
Yes, it is a main component.
Menu ribbon
ribbon
You can learn where items are on the ribbon in Office 2007.
It is a spreadsheet application included with MS Office 2007.
ribbon
You probably mean Ribbon toolbar
MS word & MS excel are just two of the suite of Office 2007 applicatons.
rupee
The four main ribbon tabs in Microsoft Office 2007 and 2010 are Home, Create, External Data, and Database Tools.