You can find the market in Heinrich-Heine-Platz vorm Carsch-Haus, in der Düsseldorfer Altstadt-Flinger Straße, Marktplatz and Stadtbrückchen. The schedule will be at 17th November-23rd December 2016 (11 am-8pm, weekend closing until 9 p.m.). In between there Is what German people called Totensonntag 20.November 2016, it'll Be closed. I'm sure there are many public transports to reach the places, just stop near those streets I have mentioned then walk a bit. Anyway, most of the times we drove around Düsseldorf by car, parking tickets were more expensive than in a village we stay.