You’ve posted in the CSS forum rather than the jQuery or .net forums, but appearance is handled by CSS anyway. We can help you style your HTML output here—just show us your code and explain how you want it styled. If that’s not useful, then we can move this to another forum.
Yes, you use CSS to style things like table borders and buttons. The key is to focus on the HTML that is output to the browser, rather than any of the asp code.
So to get help here, we’d need to see the HTML and CSS that currently apply to those elements. The easiest way is to post a link to your page.