Drupal 7.x

Please help and advise me how i can disable these messages ?

1) This page is brought to you by the argument handed to the function node_page_view().
2) Warning: htmlspecialchars() expects parameter 1 to be string, object given in check_plain() (line 1476 of ../includes/bootstrap.inc).

Dear Drupal forums,

I run an event calendar where events (content type event) contain a reference to places (content type location). Locations are administered by the people who run them, e.g. a bar owner has his own account on the site and is allowed to create events. This works as expected.

Hi,
where can I find reference to Views 3 hooks? Are they the same as in Views 2? In particular, I need the hook where I can see object with result values of each field. I tried hook_views_post_render, there is object $view but I cannot see there all views fields ( only some of them).
What is the right hook to change row field values?

When logged in as admin I had a menu with "My account" and "Log out".
I pressed "Log out". Now it shows the site without this menu, thus I cant log in again.
How do I log in again?

i get these errors whenever i try to create new views:

I (re)installed Drupal 7 using my host's scripting services, SimpleScripts. I must say that the full install of Drupal is working MUCH better than the upgrade, with which I had multiple issues.

Post installation, there's a link visible at the bottom of the page (Bartik theme) that says "Install Drupal". This link's URL is to SimpleScripts.com. I have verified that there aren't any blocks associated with this link, and would like to know how to remove it.

Note that the link is visible whether I'm signed in as admin, authenticated user, or just visiting as anonymous.