Classifieds Theme

Hello, I am having several issues with my theme’s control panel area. Here are the main ones.
1: I have lost the ability to attach images into my posts. I can insert a featured image, as you can see on my home page side bar, but for the last two months or so I have been unable insert directly into post. Here is what I get when I click the “Add Media” button. https://www.bullifieds.com/wp-admin/post.php?post=1116&action=edit#

2: My widgets page is not working, there is nowhere for me to drag a widget to.

3: My post area is very wide and text exceeds the the text box.

3:I cannot visit the image library or edit any ad from the admin area. To edit ads I have to log into that person’s account with their user name and password.

I am considering purchasing the responsive theme today, but I am wondering if it would solve these issues that I am having.

5: If I purchase the responsive theme, what happens to my settings when I upgrade/apply theme?
Have a look, my website is https://www.bullifieds.com