The key fob battery probably just needs replacing. If you replace it and the fob doesn't then work it'll need resetting to the car. Simple enough to do. It's in your owners manual. Ask again on here if you get stuck, or use the search facility on this forum using keyword 206. It's been answered before.
The bulb in the display light has probably blown, and will need replacing with a new bulb.
ChicksFan, February 2010
