Sorry for the late reply.
For the sliders options, you should go to Appearance >> Theme Options >> Sliders Settings.
You can choose to go with the more professional Slider, Revolution Slider
If you haven’t installed it yet go to Appearance >> Install plugins
and install the plugin
Once done, go to Revolution Slider menu and create/import your slider
(you should find some demo sliders in the downloaded folder from themeforest)
Please let me know if you need any help