Drupal 7.x

I need to send an email notification to the users when a new task has been created. I am doing a task list manager and when a manager create a new task I need to send an email to the assigned person for that task that a new task has been created.
I am new in Drupal and i don't know if there is another way to do this:

I've downloaded and installed Advanced Forums and the dependencies, but only two of the available themes show up in the themes drop down list, and since installing I'm also getting the following errors when I click on the main forum link in the breadcrumb on a test post I made:

Error : Undefined variable: forums in include() (in file modules/forum/forum-list.tpl.php)

Warning: Invalid argument supplied for foreach() in include() (same file as above)

I'd like to trigger an action (e.g. send an email) when the number of elements in a view falls below a certain number.
I wonder if any existing module would offer me this ability.
If not, what would be the right approach ... to extend cron processing to check for this condition?

Is there a way to create a members only area, where certain content is only accessible to members of a certain user group?

So, my questions would be two-fold. Firstly, how do I create the user group, which I would manually add users to which then gives them the permissions to access this special members area?

Secondly, in Drupal how do you create pages/area which access is restricted to a certain member group?

Thanks,

Ashley.

We thought we had found a solution for Drupal 7 in putting news in blocks with the Nodeblock Module; but now we get a block every time we create content. Nodeblock "help" says there is a radio button . . . . but if so, we can't find it to shut off the feature whenever we don't want a block. Can anyone give relative newbies some guidance. Thanks much, tony

hello

I need to show 3 single images in a Basic page content but don't know how to do it?

I need to show something like:
image

I added a new image 'field' to the content Basic Page, and in Image Field Setting I set Number of values to 3. Then I'm allowed to upload 3 images BUT they are not shown in the site. Just 1 is visible.

Do I need a module to be activated?
Thanks