mySQL 4 to 5 and Drupal 5 to 6.8

I have been trying to upgrade 2 sites to mysql 5 so they can then switch to 6.8 and I am having issues. A friend upgraded the db to mysql5 and it works fine with Drupal 5.12 but when I switch the DNS to the new folder it get a bunch of errors. The new folder already has 4 sites running on it just fine.

I am using a backup DB on a dev.mysite.com running in the 5.12 directory. I disabled modules and switched to a default theme. But when the DNS flips to the 6.8 directory I get the errors below and I cannot update.php (goes to a blank page /update.php?op=info) so what do you suggest? Did I miss something?

What is the proper process when upgrading the DB and Drupal?
Here are my errors:

Warning: Unknown column 'serialized' in 'field list' query: SELECT data, created, headers, expire, serialized FROM cache WHERE cid = 'variables' in /homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc on line 128

Warning: Unknown column 'serialized' in 'field list' query: UPDATE cache SET data = 'a:529:{s:13:\"filter_html_1\";s:1:\"1\";s:18:\"node_options_forum\";a:1:{i:0;s:6:\"status\";}s:17:\"menu_primary_menu\";s:3:\"203\";s:19:\"menu_secondary_menu\";s:1:\"0\";s:12:\"clean_url_ok\";i:1;s:19:\"file_directory_temp\";s:4:\"/tmp\";s:12:\"site_mission\";s:86:\"Thinking outside the box! Isaac Bowman\'s professional site on business and technology.\";s:9:\"anonymous\";s:9:\"Anonymous\";s:14:\"site_frontpage\";s:4:\"node\";s:9:\"clean_url\";s:1:\"1\";s:8:\"site_403\";s:0:\"\";s:11:\"error_level\";s:1:\"0\";s:14:\"watchdog_clear\";s:7:\"2419200\";s:5:\"cache\";s:1:\"1\";s:14:\"cache_lifetime\";s:1:\"0\";s:14:\"fi in /homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc on line 128

Warning: Unknown column 'serialized' in 'field list' query: SELECT data, created, headers, expire, serialized FROM cache_page WHERE cid = 'http://dev.mysite.com/' in /homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc on line 128

Warning: Cannot modify header information - headers already sent by (output started at/homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc:128) in /homepages/xx/dxxx/xxx/drupal-6.8/includes/bootstrap.inc on line 610

Warning: Cannot modify header information - headers already sent by (output started at /homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc:128) in /homepages/xx/dxxx/xxx/drupal-6.8/includes/bootstrap.inc on line 611

Warning: Cannot modify header information - headers already sent by (output started at/homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc:128) in /homepages/xx/dxxx/xxx/drupal-6.8/includes/bootstrap.inc on line 612

Warning: Cannot modify header information - headers already sent by (output started at /homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc:128) in /homepages/xx/dxxx/xxx/drupal-6.8/includes/bootstrap.inc on line 613

Warning: Unknown column 'language' in 'where clause' query: SELECT src FROM url_alias WHERE dst = 'node' AND language IN('en', '') ORDER BY language DESC in /homepages/xx/dxxx/xxx/drupal-6.8/includes/database.mysql.inc on line 128