www.wysiwygwebbuilder.com

Can i set up a website where a user can login and update their own page?

You can do this with a combination of the Login and the CMS tools.
http://wysiwygwebbuilder.com/login_tools.html
http://wysiwygwebbuilder.com/login_basics.html

http://wysiwygwebbuilder.com/cms_tools.html

i have tried this and keep getting msql errors

In that case your settings are probably incorrect.

Is mysql depreciated

By default, the Web Builder tools use 'mysqli'