I'm not sure what are you looking for, however please find the simple answers to your questions
1. you can take RDP session to SRM server and check the windows version details
2. open the console of the vCenter VM and check whether it is an appliance or windows server.
3. till vCenter 5.5 the configuration is called linked mode. from vCenter 6.0 the configuration will be called as an enhanced linked mode
simply login to the vcenter WebClient and check if you can see more than once vcenter inventory then the vCenter is configured with linked/Enhanced linked mode
Read the first question clearly. How to find SRM has installed in the Server. ?