[Theme: Twenty Eleven] Footer

What do you mean by smaller — width? height? content? Posting a link to your site would be helpful too.

you need to apply css for a horizontal menu to the the pages list;

in general: http://codex.wordpress.org/Creating_Horizontal_Menus

specific, for example:

#first .widget_links ul {margin: 0; padding: 0;
	list-style-type: none; list-style-image: none; }
#first .widget_links li { display: inline; margin-right: 20px; }

but adding this to the end of style.css of your child theme will not work, unless you repair your broken style here:

.wp-caption img {
border: none;

by adding the missing closing bracket }

How does it know it’s the footer that’s horizontal

by referring to the css id #first which is specific to the left footer widget area;

try to use a tool such as Firebug http://getfirebug.com/ to investigate those css selectors.

any way to remove the title of the links in the footer

either don’t add a title to the widget; or possibly use css to hide it:

#first .widget-title { display: none; }

add this again to the end of style.css of your child theme:

#first .widget-title { display: none; }
or
#first .widget_links .widget-title { display: none; }

then clear the browser cache – click ‘reload’ (a few times) or press ‘CTRL F5’ or do what ever your browser needs to load the new styles.