Manuals are at Books Online for SQL Server 2016
SSMS needs .NET Framework 4.6
SQL Server 2016 CTP2.0 needs Oracle JRE Update 51 (64-bit) or higher
Download from Oracle JRE download
Choose Java top left picture then "Java SE Development Kit 8u45" Accept the License and download "Windows x64"
Click on Run the on the Taskbar bring the installer to the front and just keep clicking Next!
In CTP 2.3 if Polybase is being installed the Server Collation must be either Latin1_General_100_AS_KS_WS or SQL_Latin1_General_CP1_CI_AS
This can be selected on the Server Configuration Screen during installation
Sharepoint (even 2013) wants Windows Collation Latin1_General_CI_AS_KS_WS so this was chosen
SQL Server 2016 CTP 2.3 collation with Polybase