Upgrading Drupal

I am attempting to upgrade Drupal 6 to Drupal 7. I have followed the instructions in the UPGRADE.txt file completely and am still having a nightmarish experience with a large number of very difficult errors I'm having to work through. So if anyone can assist a now very weary person that is doing my best to stick with Drupal through this difficult process, it would be most appreciated.

I'm a total newbie with Drupal and Angularjs both, so maybe I'm biting off more than I can chew, but I'd like to incorporate the Angularjs module into my Drupal 7.27 development instance. I've downloaded and installed the modules from https://drupal.org/project/angularjs but the wall I'm running into is that I don't know what's required for dependencies.

I installed Drupal 7.23 last year, and I've installed each new minor version update since. I'm currently on 7.27, but the Aggregator and Comment modules still show that they're on version 7.23.

I've checked the .info files for each module, and they are version 7.27. Why does Drupal think these modules are still version 7.23 and how do I fix the problem?

Hey,

I am upgrading my website from drupal 6 to drupal 7. Most of the things are working fine but on some pages I am getting following random errors:

Fatal error: Call to undefined function _image_check_settings() in C:\xampp\htdocs\test\sites\all\modules\image\contrib\image_attach\image_attach.module on line 192

Fatal error: Call to undefined function db_rewrite_sql() in C:\xampp\htdocs\test\sites\all\modules\image\contrib\image_attach\image_attach.module on line 517

I was able to get the update.php script to run on my Drupal 6 to 7 upgrade. So the next step was to upgrade all the modules from their D6 versions. I decided this process should be done one module at a time so I could tell which module caused problems in the event things didn't work.

I started at the bottom of my module list with xmlsitemap. It gave me the following problem: