VERY new to wordpress and atahualpa

HI- I am VERY new to wordpress and atahualpa, but it seems like a nice theme that might be able to do what I'd like to do. I am having trouble with a couple of things:
1) the widget area only displays "categories", "archives", "sample text", etc- regardles of the changes I have made to the "widget" area of wordpress, or the customization in the atahualpa editor. I am not sure what to do to get my content to display correctly. Any help would be greatly appreciated!

2) The "child" pages in the menu bar are not appearing. I wanted to have only "parent pages" appear and then have a drop down menu to display the "child" pages and I followed the intructions on the theme, but I can't seem to fix this problem- any advice?

I'm very much a novice so clear and simple explanations would be greatly appreciated.

Thank you.