demo content related

Hi,
Sorry, A lot of questions as below:
1.I export the demo content, but some pages like blog(2 cols),blog(3 cols), blog full-width are not like the live pages, I want to set my page like full-width, but when I open the page, it’s blank.
2.The demo content is not as complete as live website, isn’t it? I can’t find author detail and category detail in the Pages as well.
3.How can set the submenu like what your live website is, it looks much better.
4.Can I have full version of demo content like live website?

Many thanks.