192.168.1.254 is your router's LAN (Internal) IP address.
126.96.36.199 is your router's WAN (External) IP address and that looks normal. Do not confuse this with the internal LAN IP address in the 192.168.1.xxx range.
188.8.131.52 is a TELUS mobility IP and I doubt your router got that IP address. Where were you looking to see that IP address? Perhaps it was your mobile device's IP address while you were not on WiFi?
I have not even accessed my locked storage room which in a separate area of my rental via its exterior door where my router is housed. (The lock in this door, unknown to me, didn't have a key so remained closed but unlocked for the first 2 weeks the router was installed. It now has a new dead bolt)
If your router was not in a secure area and accessible to the public then anything could have happened.