https://goo.gl/maps/m2P13hFLRER2
The Dubrovnik Card:
171 HRK online, includes Walking the Wall (normally 150 HRK) plus 8 other attractions, 10% off at many businesses and restaurants, and free public transportation.
At current exchange rates, the card costs $3 over the wall ticket alone.
http://www.dubrovnik-travel-experience.com/dubrovnik-city-walls-walk.html
Dubrovnik Card: http://www.dubrovnikcard.com/how-it-works/#where-to-pick-up-
Tourist Office Info: http://www.dubrovnik.com/index.php/plan/plan-your-stay/164-tourist-information-offices
Dubrovnik Parking: http://www.total-croatia-news.com/dubrovnik-info/15966-your-guide-to-parking-in-dubrovnik AND http://www.absolute-croatia.com/dubrovnik-region/dubrovnik/parking
Walking Map: https://goo.gl/maps/y1qJa6kUamv
Walking Map from apartment: https://goo.gl/maps/hHzLNf87PdG2