From your website address, I couldn’t really figure out how to answer your questions.
– the look of WP is based on the theme you use. There are a lot of themes available for download, many of which you can modify. You might look for a 3-column theme since your site above looks as though it is set up with 3 columns.
– Some themes might be good for you “out of the box” but you might want to modify them. To modify themes (and modify the look and function of your blog), you’ll need some knowledge of CSS and PHP.
– For password and registration problems, perhaps include a more concise description of the problem in another post. Include the error messages, relevant code, and version of WP you’re using so that the members here can help.
Good luck!