WP Migration from One Host to Another…

So here is what happened:

I created a WP site for a client and then they said they didn’t have time to deal with it. So I archived it on my host by moving it to another folder – the whole WP directory structure. Now after a year the client wants it. So I moved it back into a live directory for her to review. But now the site runs but can’t find any of the assets I included so it all blank assets.

On top of that I’ve lost all the login credentials so I can’t get to the dashboard to troubleshoot it.

HELP!!!