Hi Karen, 

I have left a message here for Inma asking her to confirm that the translations I have for these particular idioms are correct. 

Anyway, this is what I have:

-de higos a brevas= once in a blue moon.

-a tope= fully, to the fullest.

-de punta en blanco= dressed up to the nines, dressed to kill. 

-se mantiene en sus trece= digging his heels in, sticking to his guns (refusing to go).

Hope this helps a little. 

Clara :)