How to start the left categories module expanded and product box description size

[CharlotteV]

Hello! I need to change the parameters for the left categories module that appears when you enter a category  to make it start expanded. Another thing is that inside the product boxes the description area is too big and you barely can see the product picture. You can see a screenshot on how it is now here

 

 

And how it has to be here

 

 

I hope someone can help. Thanks a million!