Hi there, via the appearance>themes settings panel go into the slide tab, and choose the option not to display the slider on any pages. This will disable the themes slider.
Then install the Revolution slider plugin, and using a shortcode enter it into the page content. If you want to use the frontpage template, you will need to go into the header.php or the home.php (if you want it just above the content and not in the header). and manually the php for the slider as directed from the Revolution Slider documentation.