Usually you don’t have images included although you would need to ask the author.
Noting else needed (except of course your own domain and hosting)
It’s worth noting that this theme is only listed as supportIng up to WP 4.5 which is quite old. This doesn’t mean it won’t work on newer versions but it’s something to consider.
I will try and check with the author on both accounts.
I am new to WP themes but assume that the actual theme structure is the same as the demo even if the images are not there. It would be just replacing an image of the same size, yes?