We have function Themelexus to import oneclick for theme to easy and quickly .
Step 1- Login to the WordPress Dashboard.
Step 2- From the Themelexus--> Import Demos.
Step 3- Click to button "Import Demo Data" to import demo data for you choose.
Step 4- Click button "Run Importer" to import
Step 5 - Next click to button "Run Importer" and you will see all our demos, please choose one demo that you want to import and click to button "Set up" .
If you want to know more, please follow our guide :