IHC Visual Model # 120B1202

[Viking1277]

I have an IHC Visual Model # 120B1202 at the core of my house electric switching system.  I recently bought the house and this system is so old that I have no way to understand how it is programmed.  It is managed through an RS-232 connection, which I don't have.  

I don't even know the value of this system other than it is currently programmed to turn lights on and off selectively through long or short presses of light switches.  That is the extent of the system's use in my home at the moment. 

I am curious about upgrading it to the latest technology.  My research tells me that all the input and output components, dimmers (which aren't used), power supplies, and everything else are compatible to the latest SpaceLogic system that was launched today.

However, I don't know what that would do, if anything for my house.  Most important for me is gaining knowledge on how my system is set up, what possibilities I have to add useful features, and if there is a way to monitor electricity usage throughout the house, so I know where we are using the most energy.

If anyone knows what an upgrade could do, how much it would cost, how long it would take, and who I need to contact in Tallinn, Estonia, I would appreciate it!  Thanks!