The rear defroster and the static go hand in hand I think, My 07 does the same thing, I think its the electrical current that interferes with the reception since the antenna is in the rear window.
The interior condensation is coming from the carpet, you bring water and snow in with you when you get in the vehicle, the heater melts and evaporates the moisture and it has no where to go but up, the only things that are up that it wont absorb into is the glass. RAIN-X Anti-fog helps but doesnt solve the problem.
As for the fuel gauge, take it in.
