If you want to get into the TV series, Start with either Series one from a few years ago or series 5. They are the best jumping on points.
Once again prior knowledge is not necessary for either of those seasons.
Series 1 - 4 is available to be streamed on Netflix.
That has been the main hurdle to overcome for people I know who have heard that the series is a 'continuation' of the old series. Many people seem to think that because of that, it will be hard to get into the current show, but I think they've done an amazing job these past few years with the new series to both make it easy for newcomers to pop in as well as satisfy the fans of the old series.
I have not had the opportunity to read the comics recently (last Who comics I've read were Marvel) but I'd love to get my hands on them because some of the stories I've heard about sound very interesting.