Hi and welcome in the Bigace Community!
To edit the templates, open Administration go to Themes => Templates.
The <title> will be automatically rendered by the {metatags} Smarty Tag. You can see its docu here:
http://wiki.bigace.de/bigace:smarty_tags:metatagsIn Blix, you need to edit BLIX (Header) - now you have multiple options:
1. remove the {metatags} TAG and add your own instead, like <title>{$MENU->getName()}</title>
2. Install the SEO extension, then you can edit the title explicit for every page in the Menu administration page.
For your first question, edit BLIX Template and find and reomve this code block:
<p class="info">
<em class="date">{translate key="written_at"} {$MENU->getCreateDate()|date_format:"%d. %B %Y"} {translate key="written_by"} {user id=$MENU->getCreateByID()}</em>
</p>
Hope that helps, if not let me know what you exactly want to achieve.
Regards Kevin