Answers as follows:
Yes they will get on your knee. Easily tamed and very placid birds.
They are docile but dim.
They will free range, but hate bad weather. They will stay inside all day in cold/windy/wet weather given the choice.
They will spend most of their life broody. They are good sitters but not necessarily good mothers.
Males will fight each other. I recommend keeping only one cockerel in the flock. They can be quite feisty.
My own personal opinion:
Great as pets, great with small children.
Given their tendency to broodiness they will lay relatively few eggs, basically a clutch and then go broody.
Given their feathered feet and legs they are not suited to wet conditions, they get terribly muddy in winter. They will also be prone to getting scaly leg mite.
I would not recommend them for a wet and windy climate. Look for something a bit tougher like sussex or wyandotte bantams, if it is bantams you are looking for. They will go broody (most bantams do) but not as often.
Hope this helps.