I'm not woried ablut the local server since it wont be able to send emails anyway.
the headers already sent error is caused by the other errors.
Deprecated: Function ereg() is deprecated in C:\xampp\htdocs\fss\admin\fss_menu.php on line 57
will need to be corrected in the fss_menu.php on line 57. instead of using the ereg function, it should use the preg_match function.
for the other errors, delete the webassist/mail/mailphp.php and mailformating.php files, then edit the universal email instance and click ok to have those files regenerated, make sure to upload the newer versions.