1. You'll need to edit your "index.php" file. Look for the following lines of code and simply delete:
<div class="left"> </div>
<?php mosPathWay(); ?>
<div class="right"> </div>
2. Again in the index.php quite close to the bottom there are the following lines of code:
<?php include("templates/yourstore/footer.php"); ?>
The php include "<?php include("templates/yourstore/footer.php"); ?>" is what generates the copy right info, just move this to your desired location in the index.php file.
3. In joomla the first menu item is what opens on your homepage on site load. All you have to do is put your "catalogue" as the first in the order of menu items.
Let me know if any of this doesn't work or makes sense.