Would love to help, but I'm not sure what you're asking. The "template" is the backend of your wordpress that is pulling the info and displaying it on your blog. None of that "shows" up directly on the web. Your "post area" is also in the admin area where you type your posts - that colour is also irrelevant to what shows up on the web. If you are talking about the colour that your post text is, when published that can be changed in your css file. But I wouldn't go around changing things in that file unless you know what you are doing.
The "skipping one line" is an entirely different question and that is the post editor that is set in the wordpress files themselves.
Maybe if you aren't getting the answers you are looking for, you could re-word the question? There are helpful people here. But its hard to help when the question isn't clear.