Few question on custom theme!!

I have few other questions that I kind of need help on.

http://ziptrig.com/media/

The position of the sidebar went off, can I know how do bring it back up?

http://ziptrig.com/media/?p=6Lorem%20ipsum

The position of the comment and previous/next post nav when off as well. When I see border around it to see where is it, it does not shows up therefore I cant do much of anything

I need to create custom page for each of my 4 links at the top how do I do those and link them?

Thanks for all the trouble