Don't think it's really necessary on the stalks, since they don't serve too many functions on Toyotas. One is turn signal and lights, the other is wiper functions and the cruise control on the steering wheel.
Some older American cars it gets a little funky cause cruise controls are operated by the left stalk, so I can see a need there. That's the good thing about most Asian made autos, everything is really intuitive, simple to operate and self explanatory. Domestics have this A/C, max A/C non-sense and you can't get airflow without running the fan, while some German cars got this snowflake deal.
One way to get light there is using directional LEDs and mount them to point towards the stalks as ambient lighting. The 5th gen has an LED like this in the overhead console to light up the center console.