Easy stuff...
Unplug everything at the patch panel. Then, go to each cable location throughout the house with your toner and tone each cable. Most homes today are wired with Cat5 for both voice & data. So...some of the cables you see could be in use for voice. Mark each cable end with a Sharpie...cable 1, cable 2, cable 3. Now you have corresponding numbers and know that when you plug cable 3 in to the phone block, cable 3 in your BR gets a dialtone. Plug cable 4 in to your router/switch and the other end becomes a network connection.
Had your home been wired by a competent cabling contractor, each cable would be labeled with the same number on each end and a map of all locations/numbers would be fastened inside the door of the patch panel/distribution center. But...your builder probably hired a hack who also happened to be the low bidder...
Relocate the DSL modem to the patch panel. Feed the wireless router from the DSL by plugging it in to the wall wherever your XBOX is (e.g. cable 3). At other strategic (Cat5) locations throughout the home, plug in a WAP (or two) that is compatible with the equipment you want to connect wirelessly.
Should go like this: Modem -> Router -> WAP