Unless the controller within the machine has been damaged a good RS485 is all you need.The functions of the machine are accessed from the console and once the programs are lodged within the controller,it can run without the computer being connected.Before doing anything with the machine powered up it may be best to remove the tool and collet as you can't know what was last in use and any tool you insert may be long enough to bury itself in the spoilboard.

The CD with Toolpath may well include the drivers for an RS485 and you need to ascertain that they will work with the operating system you have on the computer that connects to the machine-assume nothing!You may even need to find an old XP machine and use it for nothing but transferring programs.

Are you quite sure your machine has servos?I used to run a slightly older machine that had steppers which were amply powerful.

You need to know a few of the F functions before going too far and F1,F2,F4,F8,F9,F12and if you have a tool length sensor F25.There will be enough information in the manuals but they are quite "interesting" to delve into.Once set up it isn't hard to use Toolpath to send the files to the machine and I have trained a few people to do just that plus selecting files and had them producing parts within a few minutes of walking up to the machine.