MYSQL is not available

Sometimes dll must be copied in the apache directory.

Create new file in your web directory called info.php containing
<?php> phpinfo() ; <?>
Then call in your browser http://yourServer/info.php
You should get a php information page.
Post result here.

In your configuration, you have mysqli and pdo_mysql, but not mysql.
Install php_mysql module (in most configurations you only need to uncomment corresponding line in php.ini).
As of PHP5.5, mysql becomes obsolete, so further versions will try to remove this dependency.

Other messages are warnings only.
But you'd better responect the requirements : install php_imap and change max_input_var as described.