I have a Legend in my home as well, just playing/for fun, and if you're not familiar with serial/RS-232, the easiest/fastest way to set it up, is to get a Lucent 355A adapter, which adapts the jack on the unit (printer jack is the upper one) to a DB25 serial port. From there you can get adapters to adapt the 25pin serial to 9 pin serial, then a USB to serial adapter to connect it to a modern computer.
Once you plug in the USB > Serial adapter, you need to go into device manager under com/ports to see which Com port the usb adapter is.
You can then use terminal software such as Putty to connect to the serial port (1200 baud), and if you hit print on the console, you'll see your report write out on the screen. In addition, you can set putty to spit out its contents to a printer as well.
Supposedly there was a device you could get for the Merlin that would queue up a report and spit it out to a printer; you can find it in the manuals, but nowadays with some ingenuity this could be done with a $5 rasp pi and some adapters.
Jeff