You can place a PDF file into an InDesign document and from there scale and/or rotate it, but you cannot otherwise “adjust” or edit that content.
There are third party applications that can with some degree of success (or not) create InDesign documents from PDF files, but that is not a native feature of InDesign.
You cannot open a pdf. You can File/Place but it won't be editable. There are some commercial plugins that allow you to edit the pdf. I haven't use them so I cannot tell you how well they work.