Hyper-v on windows server 2012

Dear All,

I have IBM Blade center and 2 Blade Servers and installed windows server 2012 standard, and planning for virtualization through hyper-v. i.e. one physical server can use for two applications(VM's), two physical serves will give four virtual machines.

1. here do I need  three windows server 2012 licenses ? one for physical server and remaining for two virtual machines. i.e. for two physical servers to virtualize with hyper-v, we require six windows server licenses and will get four virtual machines only.

2. System center is required for to manage VM's,  is it possible to manage VM's without System center

Thanks & Regards

J Reddy