Welcome Aboard!
The switches can be removed from the front, but it is safer to remove the large trim bezel surrounding the instrument cluster, radio, and center pod (all one piece) then eject them from the rear.
As for the lighting in the rear AC, heat, and wiper switches themsleves, they are very small lamps which are crimped into place, and are designed to be non-servicable. That's not to say that an industrious person cannot replace them, but a further hindrance is that they are also coated in an opaque blue plastic to create the correct color. And there is precious little room to replace them with anything larger.
For the specialty lamps, you might want to try here, although they will not be coated:
http://www.jaytronics.com/