Filling the site with goods

There's a furniture factory website. The site is down, backup was done, but a long time ago, so it's very old, a lot of things are not. We need to restore the goods for now. It is necessary to update and supplement the products of the factory in the catalog on the site. Available products check for compliance with the updated version (if something has changed, then change, the name of the photo should be as in the title, if there are meta tags, then clean) of such work about 30%. The remaining 70% of the work is to carefully fill the site catalog with the missing product.
You need to do it fast.
I'm waiting for suggestions.