i just activated the rear fog lights on mine. just had to take out the existing switch and then unclip the bottom right button. thats all that is required for the fogs. at least that is one thing free. You still have to get the TUF approved rear lights that blink amber (not red)
PN 63 217 154 153 for left side and 63 217 154 154 for right. They run 121 euro each w/o VAT.
That should be it other than the condition of your car should be in top form including new or near new tires mounted on it and appropriate for the season.