Should you talk about your other research areas in a tenure-track job talk?
No, a job talk is not just a regular seminar. You'll need to focus more on selling yourself, your field, and your research agenda, not (only) present some interesting research.

Generally speaking, job talks tend to have the following coarse structure:


Speaker Intro (who you are, keep this part short)
Research Overview (your overall research agenda)
Deep Dive into one topic (select one topic and go into details)
Outlook (what do you plan to do in the future? what's the impact of your research?)


(1) is more of a tradition, I think most listeners don't really care about this part as the info you give here should be pretty much visible from your CV anyway. (2) is important, as it should show the audience that you actually have an agenda that goes beyond what you did in your thesis or in your good papers. (3) is not much different to a regular conference or seminar talk (4) is again pretty crucial, as you'll need to sell not only that your work is good for somebody in your field, but that your field is one that is of great interest to the faculty and science in general.

Also remember that your audience is going to be not only from your field, so you cannot overwhelm the audience with a lot of technical detail all the time. Some advice from my PhD advisor was: part (1) everybody needs to understand, part (2) needs to be understood by the people that work in reasonably close fields, part (3) should not be entirely comprehensible for anybody but you, part (4) needs to be understandable for everybody again.

(the comment re point (3) was of course somewhat tongue-in-cheek, but the idea is that for (3) you will really need to sell that what you are doing is not only important, but also difficult and interesting, which means you shouldn't oversimplify here)