Yes, I know I am doing this backwards!

My site is up and running and now I need to have a working local copy. I successfully set up zen cart using MAMP, but don't understand the next step.

How do I get my template changes, mods, and database back-up to all work on the local copy?

Now that I have a clean, blank slate on the local machine, what would the next logical step be? I have the database backed up.

Thank you for your patience.