Allright,
This error specifies that you have a method called Draw which as been declared twice. If you open en empty project, the body of the main game1 class already has some inherited methods suchs as Initialize, Update and Draw. You probably copy/pasted, or retyped a method and declared the method twice.
Double click on the error message to quickly navigate to the method that has been declared twice, and comment it out by surrounding it with block comments (/* <method comes here> */)
Good luck ...
BTW. before starting out with XNA, it might be helpful to follow some simple tutorials on the C# language ..