BE6K hardware specs … get the raw HW specs from CIMC on the UCS C220 / C200 of the appliance and compare with the Small / Small Plus TRC BOMs at https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/uc_system/virtualization/collaboration-virtualization-hardware.html#bom .
(or if they have SN#, TAC or other Cisco can look up)
Installed apps … probably have to use vSphere Client and look in VMware screens for installed VMs. You could then draw everything up in www.cisco.com/go/vmpt.
Licenses … depends on which apps/versions you find. E.g. 11.x apps some of the licenses will be in PLM on UCM VM, but others you’ll have to check the VM of each app for their licenses.