How do you use VSEPR theory to draw #"C"_10"H"_5"Cl"_7#?
Uh... there's no easy way to say this. Basically, it's not something you need to know how to draw when learning VSEPR theory. It looks like this:
And this is not at all a "typical" VSEPR structure; it's much more complicated. But if you wanted to break it down to a Lewis structure, then...