Some months ago I replaced my headlamp bulbs with l.e.ds. Far superior to the originals. Rather expensive though. I bought them from Horizon Leds.
Vis-a-vis front and rear fog light switching, I find normal sequence of front first and then rear is most irritating. I have never found front fogs to be much use. I usually find dipped headlights serve me better.
On a previous car, a 2000-ish Mondeo, I changed the wiring behind the dash so that the rear fogs came on first. Can't be bothered to bugger about with the Yaris.
Another thing I find irritating is that the first setting from Park on the transmission lever is Reverse, presumably because most drivers put their car nose-in when they park. Since the forward visibility in every vehicle I have ever driven is far better than the rear visibility, driving out of a parking space is far safer than reversing out.