Hello. i found a statue next to the prancing pony inn (place with ursula). How do i open it? It requires some kind of code to do it...

I do believe that is in LotR, its the prancing seahorse here. Find the 5 chain pull/levers through out the city and light up the 5 runes on the way down to the inn

You need to find 5 levers throughout the city, which light up runes along the walls of the city, as Nasuradin said.

otherwise...

Oops..sorry..yea..prancing seahorse..had LOTR on my mind at that time. I figured out it was the levers after talking to that man walking near the runes and about belligar summoning them.