How to use demo data?
1) You could find “Panda.theme.wordpress.demo.data.xml.xml” in main zip download from Themeforest.
2) Log in your wp-admin, go to Tools>Import>wordpress, select the xml file
3) Maybe some date can not be import please try to:
3a) For menu, go to Appearance / Menus set the main menu : Screenshot: http://d.pr/i/RGct
3b) For list page, like home page, you need to select the category in Page option panel : Screenshot: http://d.pr/i/b77r
4) For slider, you could check the section 6 Slider of Panda_Documentation.pdf, you could build the slidier same as demo site by one click.