Rhyme2rock
Generally Masters degrees are not funded by the university but by employers.
Curriculum will vary greatly between schools. My advice is to research which schools specialize in a subfield that interests you.
General requirements are an engineering, science, or technical bachelors degree with differential equations, linear algebra, and calculus based undergrad probability and statistics.
Unlike other degrees IE is interdisciplinary and the graduate curriculum usually doesn't have any core courses. Some schools will allow or even encourage ME, EE, Math, or Business courses.
An interesting fact... My department head said only about 1 of 30 IE graduate students has an IE undergrad degree.