Should I include a title page and abstract if the journal does not specify anything at all?
Papers aren't normally published in the exact form of their first submission. I suggest that you write the paper as you think it should be written and submit it. Let the editor and reviewers decide if you should make modifications.
The title page is unlikely to be necessary in a first submission as it can be added later if needed (unlikely here). But an abstract might be helpful to the editor in choosing reviewers and to the reviewers in getting a quick overview.
But they will likely, in this case, ask you to remove them for publication. It is a process. Flow with it.