The Bulbs in that brake light are replaceable mate,
their w5w 501 same as the parking lights in the front, [url="http://cgi.ebay.ie/Ford-Transit-Box-07-06-Osram-3rd-Brake-Light-Bulbs-/380352907682?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item588eccc9a2"]Click Here[/url] their clear in colour too, once the screws are removed I think it just pulls out,
you could take out the existing screws the get a bigger maybe a woodscrew self tapping type,
screw it in just enough to grip the lens then pull gently with a pliers,
should come out easy.
If you want you can also upgrade to brighter led version found here [url="http://cgi.ebay.ie/3rd-Brake-Light-LED-Bulb-Upgrade-FORD-FOCUS-98-04-/360387097443?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item53e8beb363"]Click Here[/url]
If you decide to fit the led type, get something heavy and place it on the brake pedal, to provide power to the brake light unit, you will need the power to tell you if your led bulbs are in the correct way around, as they are led's they don't have reverse polarity like regular bulbs, and its better to know if their the wrong way around befor you seal it back up.
as for the pipe if you remove the rear spoiler their is a male to male joint inside as the water jet itself has a little pipe leading from it that joins to one end of the male adaptor
the other pipe that is broken connects to the opposite end of this male adaptor
remove the rear spoiler by opening the boot,
using both hands one top and bottom of the panel under the rear spoiler in the boot,
their is 5 bolts all together two are visible before removing this panel,
they can be seen either end of the boot panel,
put a duvet or bubble wrap on the roof so as not to scratch it when removing the spoiler
as its not glued to the body its just bolted,
count and take note of the amount of rotations you do to removing each bolt,
you will need this for putting the bolts back in as if you tighten them back in too much you could split the spoiler,
also look at the side of the spoiler when the boot is open, you will see a small clip like a U shape one end going in to the spoiler the other end gripping the inside of the glass, get a point nose pliers and slide these out, their around half an inch long,
dont worry the glass wont fall out, these stop the spoiler from vibrating off the glass if the bolts ever shook loose, keep all the parts in a coke bottle or somthing, cut one in half and store the parts in it until you return with the pipe,
once the spoiler is removed you can take the small hose with you to Halfords or similar outlet and compare the size, purchasing an exact match,
once you have the hose you can also seal the broken rubber grommet from the inside of it providing a more secure seal and a lasting finish.
you can drive perfectly with the spoiler removed, you wont dammage or lose anything,
also it would be a good safeguard to spray some WD-40 or simmilar on the area before you re-fit the spoiler to prevent the area from rusting after the water jet has been leaking on it for so long,
I know all this as I've removed my rear spoiler and fitted an ST one,
Hope this is helpful to you