subpages, images and gallery

Tom ,
I know you have all answers of my questions, thats why again i want your help for these topics:
1. i want to add sub pages as u create sample pages in demo, but i dont know how to add please help me

2. i want to add images in parent page and want to link those subpages with these images as category ( we can simply add them by link )

3. when that sub page open by click , i want to add images like this http://jagdeeep.com/wallpapers/
when someone click on the image that should be open in a new page
for example see this link : http://www.santabanta.com/wallpapers/
right now its not opening like that , please help me what should i do ..

if any plugin can help me then if not then how can i do it