2. If you apply for the trademark of Xiyangyang and Big Big Big Wolf as a restaurant, you can get approval (of course, if someone has applied for this trademark in the catering industry before, it won't work), and you can name it as a special dish, as the name of the restaurant or as a propaganda language, which is not enough for infringement. Of course, in any way, you can't use cartoon images in cartoons, otherwise it will be infringement.

3. If you want to use the cartoon image, you should contact the owner of the cartoon (not necessarily the designer, but the owner) and get the license!