Need assistance with administrative interface not working for me and multiple error messages

Hi.  I just moved to a new position and was given administrative access to edit the website, but I have had several difficulties doing so including the following:

1) There is no edit button on any of the pages for me.
2) I have to go into the content list every time I want to edit something and then I can only make one edit at a time and it takes me back to the content list every time instead of showing me what the edit did, so it takes me 10 times longer to edit one page than it did in my previous job.
3) My administrative overlay screen will not show me the whole screen and this caused a problem once when I tried to upload an image - I couldn’t see the place to put the URL and it wouldn’t let me scroll up to find it.  I managed to just use keyboard shortcuts to get to the field and it worked out, but only because I knew what I was looking for and where from previous experience!

This is only happening to me, not the other person who works on this website.

I’ve gotten a bunch of errors logged from the system. 

Can you please look into this ASAP and let me know if you can fix this, either remotely or with me, so I can update the website better?  I am working on a short deadline so need to be able to do this as soon as possible.

Thanks.