Newbie with dumb questions

[Radar]

I'm an administrator in a friend's Vbulletin forum but I'm totally ignorant about PHP and MySql and I'm not inclined or have the time to learn them.
I hope someone can answer these questions in a way I can understand.
I'm good with HTML, graphics and stuff like that but this got me confussed.
First, how to access the mysql DB for example with ftp or telnet, can it be done?
Second, when some files are deleted from the forums it looks as if they still remain in the DB, how can I delete them from there?
Third: When I look at the page-source for index.html in Netscape or explorer I see that it's composed of HTML tags and the path is something like user/forums/index.php$s= and if using ftp I look at index.php is not the same file, how can I download the index.php$s= so I can edit it?
Fourth: How can the apache-access.log and apache-error.log and other logs in the log directory can be deleted or edited to reduce their size? in 2 weeks they are now over 150MB total, I want to save the space and I couldn't do it with FTP or telnet.
OK, don't hit me too hard, I'm not a hacker and don't know anything about scripting, so if you should give me a php script or command, please tell me exactly how to use it, PLEASE!
THANKS!