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It is important that you have your required files in place and properly arranged in the PDF beforehand, so that you can create your section-starting pages, and their corresponding Table of Contents in the proper order in Word.  Having to move or edit these in Acrobat, after you've added the file there, is more complicated and inefficient.  That said, it is not impossible...  

Page Numbers

If you suspect your reader might print out your PDF, you can add page numbers to the Table of Contents.

Editing Your Table of Contents in Adobe Acrobat

If As indicated above, it is not ideal to edit your Table of Contents (add or rearrange contents) within your PDF file, since Adobe isn't an efficient content editor.  That said, if you elect to add, remove, or just move sections around, that's simply a matter of using the tools fond in the Organize Pages screen, and the previous instructions.

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