Are you trying to find the ip address assined to the WAN side of the router by your isp or the actual ip of your pc assigned to it by the DHCP server built into the router?
Since you did an ipconfig /all and that ip is not what you want then a guess you looking for the ip assigned by your isp.
Do this:
type
http://192.168.1.1 in the address bar of your browser. A logon box will appear. Leave the user filed blank and type "admin" without the quotes in the password field. Then go to the status page of the router setup. This will have all the ip info.