If you want to copy setting from one workspace to another, just copy .metadata folder, but I am not sure if this might be a little bit overkill. A smaller set probably is enough: .plugins\org.eclipse.core.runtime, this will sure cover fonts, formatter, shortcuts.
While plugins, it's for Eclipse, they are installed into Eclipse folder, not in workspace folder. For example, just copy .metadata folder will copy the StartExplorer plugin over.
