MIcrosoft Word advanced formatting

I need 300 pages of word documents (around 5-6 documents) formatted to match a standard layout, getting them ready for printing. This includes assigning styles to headers, footers, outline numbering for headings, and all paragraphs also to be assigned a style so minor adjustments to the document look can be made easily using styles. Also, there will be a need to clean out the styles pane to remove unwanted styles that have come in where people have pasted in text from other documents. Also remove stray carriage returns so document looks good.