To import complete content as per the live demo, you may find Live-demo-Content.zip file included in the complete package downloaded from ThemeForest. You can import using the default import feature under Tools > Import and make sure WordPress feature is installed.
IMPORT USING DEFAULT WORDPRESS IMPORTER
STEP 1: Log in to WordPress admin dashboard.
STEP 2: Go to Tools > Import
STEP 3: Under WordPress, click Install Now
STEP 4: Click Run Importer
STEP 5: Click Choose File, and select demo-content.xml
STEP 6: On Assign Authors page, under Import author as listingpro (listingpro) select WP Admin from drop-down.
STEP 7: Under Import Attachments, check the box next to Download and import file attachments.
STEP 8: Click Submit