[Plugin: Yoast Breadcrumbs] WordPress SEO

Hi, I have a few questions related to installing WordPress and plugins recommended by Joost. By the way thanks to joost for all the help and advice, it’s much appreciated:

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Regarding to breadcrubms:

What templates are most recommended to use the code at, and exactly where within the code? Sorry I’m a total noob to php.

Joost posted:
Add the following code to your theme’s template(s):
<?php if ( function_exists(‘yoast_breadcrumb’) ) {
yoast_breadcrumb(‘<p id=”breadcrumbs”>’,'</p>’);
} ?>

What templates? I was reading that wordpress has the following templates:
* Header – header.php
* Sidebar/Menu – sidebar.php
* Content – index.php, single.php, page.php, category.php, author.php, search.php, etc.
* Footer – footer.php

Also, where exactly within the template’s code? Anywhere?

I have another question. Is it possible to change the styles of the plugin so letters will display bigger, place a background for the breadcrumbs or make links show in another color just like Joost has in his blog? If so, where? Thanks.

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Regarding Cleaning up the theme:

In header.php, how to:
* make your stylesheet URL’s static
* make your pingback URL static
* make your feed URL’s static
* you can remove the blog’s WordPress version
* make your blog’s name and tagline / description static