Why Elsevier Journals don't change status of a paper?
See also: What does the typical workflow of a journal look like?


Of course Elsevier journals change their status when there's an update. "With Editor" is one of the earliest statuses, and not progressing is a bad sign.
You "come to know" about the paper's status by looking at its status. It's "With Editor" right now. 
You didn't say which editor you emailed, although not getting a reply is another bad sign, of course. Did you email the journal office, the editor-in-chief, the handling editor, etc? Whichever you emailed, try emailing a different editor.
Considering it's been months and the editor apparently hasn't invited reviewers, waiting is not a good idea. Email the other editors, or withdraw your paper and submit elsewhere.