Hello,
I don't know who you are so I cannot identify you by name. If you have a moment, please do address yourself.
You can edit the pdfs using
PDFescape or other free PDF editing software. Here is an article about editing PDFs online which was written in '09 so some of the links might not work unless you google them
http://www.labnol.org/software/edit-pdf-files/10870/
If you google 'edit pdfs' you might also find other free options online but I know that PDF Escape works.
As for the Word documents scanned...you won't be able to edit them unless the originals you are working with are indeed Word documents.
The only scan-able document editing software I am familiar with is OCR software. There is a free trial here
http://www.smartocr.com/?gclid=CK77y...FcG77Qodp1F1tA
I have not used the OCR software but you should be able to edit scanned documents.
Janine