Brake fluid drips on the hand brake

Hello you, have just got a problem in my R850R 97 model. Attached are two pictures which represents my problem. ( have marked the problem with an arrow ) From one place on the hand brake drips brake fluidity out. So it is not so much but still I see from time to time that brake fluidity drips (only when the steering wheel is standing straight ) . If the steering wheel on the left side has not gone away. Can someone also explain to me what owns the screwdriver does in second picture? I can’t unscrew this screwdriver in a funny way. A dealer told me that the brake pump is broken and should be renewed. What does it cost? Is there something cheaper for the model? And you need at all or can you solve it like other things. I don’t think it’s been lying on the brake pump since the motorcycle hadn’t moved for 6 months. In between, it crashed to the right because of strong side wind but it hit the right boxer cylinder first. and then the hand guard part. So brake, gas, etc were not hit. Thanks in advance !