To open the fuel cap, there's a switch on the right side of the driver's footwell, at the bottom of the driver's seat itself. The fuel cap is on the left side of the door, by the way.
In the unlikely event you need to get into the bonnet, you'll find the release trigger below and to the right of the steering wheel, underneath the ignition button.
Once you've popped the bonnet, you'll find the lever to open the bonnet itself to the right side of the Toyota badge. Lift it upwards to get it to catch.