MichaelH

From a user prospective the problem is garbage like the base_64_decoding stuff. Get rid of it please.

Copy your index.php to page.php, delete any loop code there, then add that code.

For the TwentyTen theme the Page Template would look like:

<?php
/**
 * Template Name: My Page of Tags
 *
 * Selectable from a dropdown menu on the edit page screen.
 *
 * @package WordPress
 * @subpackage Twenty Ten
 * @since 3.0.0
 */
?>

<?php get_header(); ?>

		<div id="container">
			<div id="content">

<?php
//list terms in a given taxonomy
$taxonomy = 'post_tag';
$term_args=array(
  'hide_empty' => false,
  'orderby' => 'name',
  'order' => 'ASC'
);
$tax_terms = get_terms($taxonomy, $term_args);
?>
<ul>
<?php
foreach ($tax_terms as $tax_term) {
echo '<li>' . '<a href="' . esc_attr(get_term_link($tax_term, $taxonomy)) . '" title="' . sprintf( __( "View all posts in %s" ), $tax_term->name ) . '" ' . '>' . $tax_term->name.'</a></li>';
}
?>
</ul>

			</div><!-- #content -->
		</div><!-- #container -->

<?php get_sidebar(); ?>
<?php get_footer(); ?>

1. Code your template to list posts in different loops.
See:
Stepping Into Template Tags
Stepping Into Templates
Template Hierarchy
The Loop
2. Use plugins such as:
# http://wordpress.org/extend/plugins/postlists/
# http://wordpress.org/extend/plugins/pages-posts/
# http://wordpress.org/extend/plugins/list-category-posts/ (uses shortcode)
# http://wordpress.org/extend/plugins/simple-posts-list/ (uses shortcode}
# http://wordpress.org/extend/plugins/nurelm-get-posts/ (uses shortcode)

Make sure your host hasn’t changed anything.

Make sure you host has httpd.conf correct

May need to add:
AddType application/x-httpd-php .php

to your httpd.conf file.

Also make sure you have enough memory allocated to PHP:
Methods for increasing the amount of memory a PHP script may consume.

1. Use the memory bump plugin from http://wordpress.org/extend/plugins/memory-bump/

2. If you have access to your PHP.ini file, change the line in PHP.ini
If your line shows 32M try 64M:
memory_limit = 64M ; Maximum amount of memory a script may consume (64MB)

3. If you don’t have access to PHP.ini try adding this to an .htaccess file:
php_value memory_limit 64M

4. Try adding this line to your wp-config.php file:
define('WP_MEMORY_LIMIT', '64M');

5. Talk to your host.

The other problem would be not having the correct database name/server in your wp-config.php.

If you database is intact (look at wp_posts table for posts from two years ago), then I would immediately do a backup of the database then check your wp-config.php file.

It’s been a while since I wrote this but maybe it will help:
http://codex.wordpress.org/User:MichaelH/Installation_Notes/Yahoo

Change your Settings->Reading->Blog Pages show at most x posts

Change the post_per_page setting in your Template.

Use a plugin such as
http://wordpress.org/extend/plugins/custom-post-limits/

Not sure what you are asking.