the goose is definately a lost cause it would be more like 16kg man.
For your pedals chuck on a set of good plastics there only bout 25-30 bucks last a while and way better on the shins haha
man there isnt much you can do with a goose to make them light your frame and rims would way a ton.
But if your thinking of keeping it i would put a good set of 36 spoke rims with a new rim you could get smaller gearing like 25-9 which would be a fair bit lighter.
For your seat post your...
Name: Vonny
Age: 19
Location: Yorke Peninsula, SA
Job: Paver
Likes: racing big bikes, bmx, getting pissed
Rides: 09 crf 450, soon to have a dhz 140, drive a hiace on 20s