There are two ways to interpret your initial question.
- How to get TSO consoles, or
- How to get consoles dedicated to operator consoles, as opposed to TSO.
There is no practical method to get TSO consoles; these are assigned as people logon to TSO. Since most people access TSO through TCP/IP interfaces these days, or through TCP/IP connecting to a session manager connecting to TSO, there is no single method available to answer your question.
There is a method to answer the question in the second bullet, but it is not a TSO solution; the D CONSOLES operator command. As with TSO, the console list can be very fuzzy, since an operator console can be obtained by using VTAM style connections, which leaves the possibility of connecting via TCP/IP. I don't know what is involved in logging on as an operator console; I know a userid requires special permissions to do this, so I don't know how common it is.