Upgrading Drupal

hi everyone ..i m making a site locally with various modules on d7. i was in 7.4 and i saw updates on modules...so i pressed the recommended modules... BUT not the calendar module because there was a warning for compatibility.

so i m stuck with a bunch of problems where i cannot see the site at all..and bad luck..no backup files!my bad..
i noticed that date views and api screwed things up..!!!!!!!

once i saw the site was not getting live ..i upgraded from 7.4 to 7.7 in hopes that would make things better! no luck...

so (1) i got an update.php error:

Warning: require_once(C:\wamp\www\artists/sites/all/modules/date/date_views/includes/date_plugin_display_attachment.inc) [function.require-once]: failed to open stream: No such file or directory in _registry_check_code() (line 2680 of C:\wamp\www\artists\includes\bootstrap.inc).

Web server Apache/2.2.17 (Win32) PHP/5.3.5
OK
PHP 5.3.5
OK
PHP register globals Disabled
OK
PHP extensions Enabled
OK
Database support Enabled
OK
PHP memory limit 128M
OK
File system Writable (public download method)
Error
Unresolved dependency date_api (Missing)
Calendar requires this module.
Error
Unresolved dependency date_views (Missing)
Calendar requires this module.
OK
Unicode library PHP Mbstring Extension

I am planning to revise my website which currently operates with Drupal 5.2, using Adobe Dreamweaver CS5 software. Will Drupal 5.2 be compatible with the this Adobe software? And will Drupal continue to provide support for this version? Thanks.

I get this error message when trying to create a new Views page or block. When I click on save I get a message that page could not be found and I also get this error

user warning: Unknown column 'core' in 'field list' query: INSERT INTO views_view (name, description, tag, base_table, core) VALUES ('myotherlist', '', '', 'node', 6) in C:\Users\xxxx\xxxxx\www\xxxx\xxxxxx\sites\all\modules\views\includes\view.inc on line 1760.

What does this mean?

I am unable to create and save a View ;(

I am running Views 3 and Drupal 6.

upgrading Drupal 6.22 to 7.7, using theme Garland, without contrib modules.

in update.php step, show this error:

After upgrading from 7.5 to 7.6, I try a "minimal validation" test which is to create a "Basic Page" and save it, then I get the following error:
--------------------------------------
Fatal error: Call to undefined function i18n_taxonomy_field_is_empty() in /homez.386/terimaka/www/drupal7/modules/field/field.module on line 489
--------------------------------------
I tried many things like:
- Disabling Internationalization module
- Installing the latest Internationalization module

I recently upgraded my site from drupal 7.0 to 7.7 using these directions http://drupal.org/node/1223018. The upgrade went fine, but I ran into some problems later and had to restore a backup.

I later re-upgraded the site to 7.7 using the same process. Now, however, though my changelog and core models all show 7.7 i n their files, my Drupal modules screen and status report both still have me at 7.0. I have erased the files and repeated several time with no results.

Any suggestions?