How to add of wordpress to onepage?

I need your help. I was bought Canvas 5. But I have one problem is I see menu, header, and footer don't same with word press. This is my domain: xehondaoto.com
And this is onepage I was try add: https://xehondaoto.com/honda-city
I want to ask two question.

1. How to add my menu and footer? (I use wordpress) (I was attach image about my header and footer you can see that)
2. And have any wave to decrease folder size, I only use onepage is: car. But I upload all your folder about ~600MB is very strong with my this. I only want use onepage car. But when I try upload only one folder car in folder demo. I see it very terrible. Can you help me!