One or 2 revisions oid. Your processor is either a CP10 or 20...20 is latest. MLC (software phone, IOS, Droid, Windows) is a software license. Again, you will need access to the portal (vendor) to see ALL your licensing. Outdated, not even close if you keep up with all the licensing and NEC SWA. You may even have MLC licenses (there was a promo some time back). Takes years of training and installing to know all the ins and outs of the system. It's not realistic to watch youtube or read a manual and understand everything without a baseline of knowledge or how VOIP/TDM systems work. All phone systems are pretty much alike save terminology and details but you have a basis in knowledge before it all just "clicks". Like people that try and figure out Cisco ASA's without understanding basic networking etc. Let mew know if your vendor can help you. Depending on where you are you (be more that happy to help your) can always put a vendor change form in. Obviously, any vendor is going to want to be paid to activate new features and train someone to administer the system.
Have a great day.