Wanting a puppy

Hi my name is Kaila and I am looking for a puppy for my three year old son. I cant afford to buy one, so it would have to be a freebie.
I wont take german sheppards or small dog breeds but will take most medium to large breed dogs. I love rotweilers, golden retrievers and labradoors. I have another dog for the puppy for company and a huge yard. the puppy will probably be spoilt as I am a dog lover. I will only take a girl puppy and will take them up to the age of 12 months so please email me at camkaz08@live.com.au
Thanks

good luck

does it matter if its a cross??
does it have to be desexed?will you get it desexed if not??