|That is great news. At least you know where they all terminate. Are they labled as to which room is which wire?|
Do they terminate near a wall?
Do the phone jacks outlets in the rooms have network ports?
Here is the sequence of events to get these usable.
Put up a "green" board or 3/4" plywood on a wall with enough space for everything. I usually do a 4'x4' half sheet of plywood.
Run a 20amp circuit to the mount board or tap into an existing circuit and bring power to the wall board.
Buy and mount a surge protector
Install a patch panel with enough ports plus a couple of extra for all the wire runs.
Punch down the wire to the port jacks and mount in the patch panel.
Bundle up all the wires with zip ties so you have a clean straight run [no loops or kinks] of wires going to the patch panel.
Mount a shelf. Buy a switch with enough ports to accomidate all the wire runs plus extra. You will need a minimum of one extra port in addtion to all the wired runs for the internet router.
Buy patch cables [3' or less] and patch from patch panel to the switch.
Buy and connect a internet router to the switch.
Run a patch cable from the internet modem to the internet routers wan port. Configure the router.
Connect your workstation to a network outlet and you are off and running.
You can pick up most of this at a Lowes or Home Depo and do yourself if you are construction/mechanically inclined.
Otherwise you want to find a low voltage electrician in your area to come in and do all of this.