Drupal 7.x

Hi,
How can I migrate username and passwords from drupal6 to druupal7?

I have installed Drupal 70.2and upgraded it to 7.4 as well as upgraded all modules to the most recent and started activating the modules that I need/want to use. This is where my trouble starts. I activated Entity (ver 7.x-1.0-beta9) and Entity tokens (ver 7.x-1.0-beta9) as well as Organic Groups and I receive errors as follows:

Notice: Undefined index: label in entity_token_token_info_alter() (line 54 of /home/content/87/5712687/html/sites/all/modules/entity/entity_token.tokens.inc).
Notice: Undefined index: label in entity_token_token_info_alter() (line 59 of /home/content/87/5712687/html/sites/all/modules/entity/entity_token.tokens.inc).
Notice: Undefined index: label in entity_token_token_info_alter() (line 54 of /home/content/87/5712687/html/sites/all/modules/entity/entity_token.tokens.inc).
Notice: Undefined index: label in entity_token_token_info_alter() (line 59 of /home/content/87/5712687/html/sites/all/modules/entity/entity_token.tokens.inc).

When I looked at the data on those lines this is what I see:

54 'name' => $property['label'],
55 'type' => isset($property['type']) ? array_search($property['type'], $valid_types) : 'text',
56 // Mark the token so we know we have to provide the value afterwards.
57 'entity-token' => TRUE,
58 );

Then i go to the www.mydomainname.com/rss.xml i see the RSS feed, and it only shows the Articles content type.
In my content types I have created a few more content types (report, blog, announcements, etc.) and i want those to be published in the RSS feed as well.
Can someone please let me know how to do this?
Thank you

I've installed Drupal and need to create a very basic simple registration that is required for all users. Once registered, I'd like to give my users access to downloadable PDF's. Is there a simple module to do this or is this already built in to Drupal?

Is it possible to create a menu item that takes you to a page that lists all content types of a particular kind? For example I create a content type 'mediateca' and want a menu item 'Mediateca' that takes you to a page listing only that content type.

I've very new to Drupal, have learned a lot today but this has me stumped. I can't help feel that I'm missing something blatantly obvious.

Many thanks in advance.

Hi

After upgrading to D 7.4 & updating a couple of modules, I have this error at the bottom of the site:
Fatal error: Cannot access empty property in /home/woof/public_html/includes/common.inc on line 7399.

I dont quite remember seeing this specific error when I updated, and just noticed it later when working on a theme. I first suspected the theme, for which I had just created a subtheme, but it appears with other themes, including Bartik.

So, what could be the source?

Regards