Please help me with my Samsung Le26

I've just purchased a Samsung LE26R88 and i'm having lots of problems. I want to connect up my old stereo speakers to the tv so the sound comes out those, but the sound is pathetic and really quiet. what should i do? Also it comes with freeview built in and i can only get 15 channels, do i need a new ariel? is there a way to test this b4 spending all that money?