SharePoint Server 2013

I'd like to know three things about MS SharePoint Server 2013. 1. As I'd like to simulate the version that enterprises are using, is the SharePoint Server a good version to simulate an Enterprise version? 2. For what concerns an Excel file sharing, is it possible to let numerous people edit the same file simultaneously (like in google docs)? Or what about the simultaneous consolidation of different files in one file? 3. Would Outlook 365 allow to do the same things? Thanks in advance for your help!