Got this hose below which runs from the back of the block to a hole into the wheel arch. It has a plastic bottle attached to it. Is this a breather hose and if so whats the bottle for??

The charger in mine has had this part blanked off and from what i've been reading i need to get myself some PTFE grease/oil???? i think this is right and spray it into the charger whilst it's running every 1K or so can anyone tell me exactly what i should do and also is there not some sort of kit that you can buy which does this itself?

The brakes on the G are pretty shocking is this normal??? and if so whats the best thing to do?? conversion, uprated disks/pads??