The IDW and Mirage runs are nothing like the cartoons in terms of tone. The comics have adult themes and darker elements, however they will mix in some comedy here and there. Try to read an issue or two on comixology, or buy a TPB to see if you like it. You can't go wrong with the original comics or the current run from IDW. To give you an example of how different the comics can be from the cartoons, I would recommend reading the 'Return to New York' or 'City at War' arcs from the mirage series.