Evo or Revo? With Evo. I routinely keep a local copy of sites and freshen it from the live version now and then. One thing worth trying if all does not go smoothly is to copy the standard Install folder to your local root and run it. If you’ve put everything in the right place, and imported the database, running the install should come up with the "Upgrade install" selected. Then you proceed to untick all the offers to install/upgrade snippets etc.
At the end of a successful install, you should be able to log in normally. If it’s not successful you shoud have a better clue as to what’s wrong. Once in, don’t forget to go to the Tools > Configuration and set the file manager and assets paths, by hitting the Rest button next to the relevant fields.

KP