Just from my experience as an undergrad taking graduate classes for electives
(I hear professors talk about their expectations very often)
Mathematics/Logical Reasoning: You haven't said the programs but even things like economics need a strong math background, and more people need logic
Student Research: Even if it's just helping gather data for a researcher (you do have those right?)
GRE Scores: I never hear about these from professors, which tells me that the people in grad programs are acceptable
General Aptitude: Goes along with GRE scores, some way to compare on a national scale to ensure students have learned something
Faculty Achievements: IMO less important than most people make it out to be, but if a faculty member has earned recognition then for
sure put it on the website (any good admissions officer won't just
look at your brochure). Don't go too far with this, but showing that
students have been taught by able teachers is important
Textbooks specifically (in my non-professional opinion) make it look like you're trying to fill up space. I've had professors who are very adamant about certain things tell me they've looked in every textbook to find a piece of information (I believe them, that's game theory professors for you). I think most professors with office phones have gotten calls from textbook reps. Most of them do probably know all the textbooks in their given field because of this. But who knows the connotation that professor associated with that book. It could also just be a department teaching style difference, either way I don't see this as always being a positive thing to add to a brochure.
In case you're curious my searched every textbook for how books modeled Deadweight Loss in a market characterized by monopolistic competition; the struggle comes from some textbooks incorrectly showing that the marginal cost curve is flat if the market were in perfect competition, when often times natural monopolies are actually more efficient due to economies of scale, think electric power generation, lets just make a large plant rather than many small ones.
He found that most either incorrectly assume a horizontal marginal cost curve, or completely ignore the topic to avoid the issue.
Sorry for the aside, if you want more information from an informed student's perspective just let me know!