[get error while create a new virtual machine on SCVMM 2012]

Looks like you're not alone.

http://www.thomasmaurer.ch/2013/01/scvmm-2012-sp1-error-windows-network-virtualization-is-not-enabled-on-a-host-nic-available-for-placement/

[Networking in Hyper V]

In Hyper-V manager go to:

• Virtual Switch Manager(right side)
• New windows opens - "VIrtual switch manager"
• Select "New virtual Switch"
• Choose "Internal"

[WDS 2012 - Application install options]

Hi. I think you should use MDT 2013 update 1 with ADK10 (NOT last release!)
They are free. MDT allows you (using adk) to organize your driver store and OS, besides it's relatively easy to configure your thick/thin (OS and all stuff included/os only, stuff being installed during setup) images for deployment.

[Windows 10 RSAT]

Whats the deal with no DHCP tools?!?!

Looks like not full release, maybe. Seems like all tools should be ready when Server 2016 is published. Now I just don't see them in my ServerManager drop-down list.

[Windows 10 RSAT]

At last!

 

Windows 10 RSAT (Remote Server Administration Tools) are available for download!

 

 

Except following:

• DHCP Tools. Dhcpmgmt.msc is not available in this release of RSAT, but equivalent Windows PowerShell cmdlets are available.
• IP Address Management (IPAM) Tools. IPAM tools are not available in this release of RSAT.
• Network Policy Server Tools. The NPS console is not supported on a Windows client-based operating system, and will be removed from future releases of RSAT.
• Routing and Remote Access Tools. Routing and Remote Access Tools that are GUI-based cannot be used for remote configuration in this release of RSAT, but the equivalent Windows PowerShell cmdlets are available.

Again, use this to download and try.