Font Verdana for body

This is the default theme. Where i insert the code, and what is the code?
#header .header-quote .quote-bold,
#primary-nav li ul li a:hover,
#primary-nav .nav li ul li a:hover,
#column3 .category-box h3 a,
.entry-author a,
.entry a,
#newsletter .subscribe a,
.widget_tj_twitter li .content a,
.comments-box a {
color: #369;
}

#primary-nav {
background-color: #369;
}
#column2 .entry-cat {
background: #369;
}