Themonic

It is designed as mobile first, disabling responsiveness is not as simply removing some section, apologies for the inconvenience. You should better check out the non responsive themes if that is your requirement rather than modding a responsive theme.

You just have set your menu as primary menu, read FAQs given here http://themonic.com/iconic-one/

Replace h1 to h2 in line 21 and line 23 of content.php

To move sidebar to the left in Iconic One, paste this in custom.css

.widget-area {
    float: left;
    margin: 30px 0 24px 20px;
}

.site-content {
    border-right: none;
    float: right;
}

It doesn’t appear to be a Iconic One theme issue..

To check if it’s a theme related problem, switch to default WP theme and check if the problem exists.

To show full posts on home page instead of excerpt:

Remove || is_home() from the following line

<?php if ( is_search() || is_home() || is_category() || is_tag() ) : // Display Excerpts for Search, home, category and tag pages ?>

It would become

<?php if ( is_search() || is_category() || is_tag() ) : // Display Excerpts for Search, category and tag pages ?>

it is line 44 of content.php

After doing this you can use the <!–more–> tag in articles to break your posts for home page.

Kindly use a page and select it as static home page for such functionality.

Refer: https://codex.wordpress.org/Creating_a_Static_Front_Page

It appears to be Nextgen gallery issue

http://wordpress.org/support/view/plugin-reviews/nextgen-gallery?filter=1