Various interface issues on TBC

One interface issue in particular that's stumping me is I don't have a text input box with my chat window. I can create one for /s, /w, and /p but never for global, trade, or world chat. I can't click on Trade for instance, and get a text input box to type a comment into. I've tried deleting WTF and cache folders. I've tried reinstalling the client with a clean download. No add-ons. Doesn't matter what I try I can't get this text box to appear so I can chat.

Another issue is pet talents. Some of them don't appear on the pet spellbook. When I tried to unlearn pet spells, the ones I had learned disappeared from the spellbook and I can't get them back or relearn them. Also, no pet talent tree to assign pet talents to.

Those are the primary issues so far.