what jobs could a Masters in Legal Studies or Management or Liberal Arts get me?

Nothing specific. A Masters in Legal Studies? Why not just get a law degree? I suppose you could be a paralegal.

A Masters in Law, on the other hand, is a degree that, in the US, is earned after you earn a JD -- a law degree -- and is the degree that people need to teach at a law school. Some people earn it in order to specialize in a particular branch of the law.

A Master's in Management -- do you mean the equivalent of an MBA? A Master's in Business

Administration? With that, if it's essentially the same degree, you could get any number of jobs in business.

A masters in "Liberal Arts" is meaningless. You need to earn a graduate degree in a specific BRANCH of the liberal arts -- History or English, for example. With such a degree, you could teach on the secondary level, though in the US, if you want to teach in a public school, you also need to acquire certification. With an MA in History, you might work for a historical institute/museum, in research, for example, or as a curator, or for a publication that specializes in history. With an MA in English, you'd be qualified to teach at a community college, though not at a 4-year college or university, for which you'd need a PhD.