razakenad Hi
1) Try add this to custom.css file and adjust min-height value accordingly :
.t3-mainnav .navbar-inner {min-height: 80px !important;}
For font-size, You already have this css code snippet in custom.css file in which you can adjust font-size accordingly :
.t3-mainnav .navbar .nav > li > a {
font-size: 16px;
color: black;
font-weight: bold;
}
2) The similar query has already been addressed here Please do not cross-post so as to avoid confusion primarily
