You appear to be using different terms interchangeably that are not interchangeable. It's confusing to know what you're talking about, because you keep talking about different things as if they were the same. They aren't. Please clarify using the proper terminology.
Outlook applies to only one thing: Microsoft Outlook, an application that comes with Microsoft Office, but occasionally sold separately.
But, there are a bunch of things that contain the word Outlook in their name, but are NOT Outlook itself:
There is also Outlook Express, a mail app that came with older versions of Windows (XP and earlier)
There is Windows Live Mail (which is not Outlook, but is derived from Outlook Express in the past).
There is Outlook.com which is the new web based email service from Microsoft.
There is Outlook Web Access (OWA) which is a web site provided with Microsoft Exchange for corporations that emulates Outlook on a company web site.
None of these come with Windows 8. Windows 8 comes with the Windows 8 Mail app, which is NOT outlook, nor is it Outlook Express.
You *CAN* install Windows Live Mail on Windows 8, from the Live Essentials application, but this does not come with Windows 8.