Toyota 4Runner Ignition Switch Key Remote

Hello, I Replaced The Battery In My Key Fob And It's Still Not Working. When I Try To Start It, The "no Key" Symbol Comes On...

Previously, The Car Used To Unlock Centrally With The Remote Control. It's Still Unlocking Though With The Remote However The Boot/ Back...

Key Fob Doesn't Work. I Do Not Have An Original Rubber Chipped Key, No Keyless Entry, Plain Jane 4runner. Replaced The Battery, Still Doesn'...