how to Remove "Add new Content" from the Main page
Just add this code to the page.tpl.php or page--front.tpl.php on Drupal 7.

find

&lt;?php print render($page['content']); ?&gt;


and replace with below code.

&lt;?php  if(drupal_is_front_page())
                {
                    unset($page['content']['system_main']['default_message']);
            } 
        print render($page['content']); 
    ?&gt;


And i believe you surely get all blocks or contents you posted on page.

and to remove page title on page like

Welcome to "website name"

find this code on page.tpl.php or page--front.tpl.php

&lt;?php if ($title): ?&gt;&lt;h1 class="title" id="page-title"&gt;&lt;?php  print $title; ?&gt;&lt;/h1&gt;
&lt;?php endif; ?&gt;


and you can remove this code or else just make a comment over.