The instrument lights are hard to see during the day time with the headlight switch on or off it is normal. If you look hard enough you should see a slight difference though when you turn on the headlights during the day. It is also possible there is a couple burnt out bulbs the 4th gen does not use leds to light the instrument lights and they do burn out every now and again. To fix a burnt out bulb you have to pull the instrument cluster. Before doing that check the dimmer wheel it's below the headlight switch make sure is all the way to the right just befor it turns all the interior lights on).
The radio display has a common problem of a solder joint going bad that causes you to not be able to see the display. It is an easy fix if you know how to solder. Do a search for dim radio display in the 4th gen forum and there is a tutoral on how to fix it.
Actually I found the post for you here it is
How To Fix your dim radio display
This is a 2006 but it applies to all models with this display.