Edge marking not rendering

I’ve gone through a handful of different forum posts with he same questions and all the solutions seem to still give me no results at all. I’ve tried playing around with all the different options and menus and still they won’t show up. I’m just trying to do what they did with the lines so i can make my model of him even more true to the real model from the film

Give freestyle a try. May need a bit of tweaking your model to mark a few edges to make freestyle render them, but it should give a usable result.