Why serviceBehavior part is not generated on client side automatically after ServiceReference tool in Visual Studio as endpointBehavior?
Wsdl.exe or "Add Service Reference..." generate proxy classes, datacontracts & config based upon exposed metadata. Commons ways to expose metadata is by using a mex endpoint or exposing a wsdl.
Basically, Behaviors are simply not exposed. That's why you can't generate the same endpoint behaviors on client side.
What is important here, is that many behaviors are "local settings only" (for a service OR for a client ). It does not tell to clients how to call the service, but how the service should run.