Windows Server & CALs licensing

Question

Hello! I'm member of BizSpark program.
 
I have the following configuration:

1. One Windows Server running as virtualization host, TFS host and developer environment.
2. One Windows Server running as AD DC
3. A few number of virtual machines, used to test my product and site

 
Here's my questions:

1. Do I need a license for TFS host, because MSDN whitepaper says that I need a separate license for it (MSDN subscriptions not allowing using of Windows Server for any purposes, except development & testing).
2. Do I need buy a CALs for RRAS, if I'll configure Internet access via NAT for my virtual machines?
3. What happens with first and second cases after BizSpark graduation?

 
Thank you,
Alex.