Add table of contents / update item numbers in a 23 page Microsoft Word document

I have a 23 page document. It was originally imported from a text file. It contains numbered paragraphs. Because it was imported, the item numbers are simply typed - I need these to be changed to automatically numbered list items. This includes paragraph numbers, and numbered/ordered lists. I also need the table of contents to be automatically generated as well. The document is in English. It is written in a formal style. It is about 6000 words long.