Change font menu and 'read more'

Hi,

just started working with your theme. After many trials (and errors…) I would like to have your help with changing the font of the ‘read more’ button and the menu-font. The line in the slider (the top one) should stay the way it is). I tried several css-things, but didn’t work out.

Other question: how to get the pages of the menu on 1 line, even on a smaller laptop for example.

Can’t give you the url to my site: it’s put ‘under construction’. Thanks in advance for your help.