Hi Lav,
I'll just go through each question and answer them by number:
1) Is this on Blog posts or Portfolio Posts? The images should be constrained by width and then the only thing that would make them appear unusually large would be a much larger image height than the width. If you have an example, we can get a bit more specific.
2) Try adding the following CSS to your Quick CSS (located under the Styling Tab in the theme options) or the custom.css file in the css folder of your theme files:
#top .main_menu ul:first-child > li > a {
font-size: 14px;
color: #333
}
You can modify the social icons but it will definitely require some tweaking to more than just the following depending on what you want to do and how big you want to go:
#top .social_bookmarks li a {
height: 100%;
width: 50px;
line-height: 50px;
}
That is just the basics but you may need to modify the actual social icon image files as well as the css mods.
3) For this one, you'll need to edit the theme files. So either connect to your host via FTP or your servers file manager to open and edit the proper file. Within the theme files go to framework>php>function-set-avia-frontend.php. Then search for:
$output = __('Archive for category: ','avia_framework').single_cat_title('',false);
You can just the output for the archive category pages there. Just make sure to keep it within the single quote and no html.
4) You can use wordpress' more tag to tell the theme where to cut off a post and display the read more button. You can find the More Tag button in the first row of the visual editor toolbar or by pressing Alt+Shift+T
5) Looks like you've got that working on your site now :)
Regards,
Devin
Create a new thread and tell me what problems you are encountering and what you want to know. 
There is no step 3 :) 
