Where and How can I enable the Virtual Hyper-V Windows 2008 R2 Server Web Console?
The IIS is only set up as the default content, nothing more than that.
Just to avoid using Remote Connection every time I need to start / end a VM.
There is none. To manage Hyper-V from say a Windows 7 client you simply install the appropriate Remote Server Administration Tools (RSAT) and use the included Hyper-V Management Console to connect to your Hyper-V server. The RSAT pack is available for Vista, Server 2008 and 2008 R2 as well.
There is at least one ongoing project to develop a third party web console but it doesn't look very useful yet. If this is something people would be interested in however I've thought about doing it recently - though if it can't be run properly on the pure Hyper-V Server it doesn't feel as cool, requiring a separate web server (unless it's bundled with a text-based UI for initial VM setup/management ^^)
You can also just simply use the local (R2 only) or remote powershell console to manage VMs thanks to James O’Neill's neat Powershell library for this.
Maybe reading documentation helps. Your query is hard to understand, but let me try answer all various ways I can read it:
So, really - this is it. I have no clue what elese you may think you asked, but in general, better read the documentaton first to make sure what you ask for really is even vaguely supposed to exist.