ESXi is licensed by physical CPU sockets, so you'll need two CPU licenses for the host.
Btw. you never responded to Re: license question, so I'm not sure whether you saw my answer there. Maybe you already have all the licenses that you need!?
VM tech support mentioned same thing - 2 of
VMware vSphere Standard License Version (6) 1 Processor
Mfg. Part#: VS6-STD-C