To create a new Revolution Slider for your homepage you have to do the following:
Go to Revolution Slider section in the admin area and add a new slideshow.
More info and documentation about how to set up Revolution Slider can be found here: http://themepunch.com/revolution/documentation/
After that go to your homepage and edit the page. Go at the bottom of it in the Layout Options metabox and assign the slideshow to the page.
After that set the type of the slideshow to Revolution Slider. Bellow choose one of the revolution sliders that you’ve created.