TV Pilot show? Legalities? Royalties?

[janie]

I'll try not to make this too confusing!
I am starting business as sole distributor for fantastic new childrens' toys.
The creator of toys has commissioned and obtained 30 seconds of animation of these toys...he has no more funding to increase length of animation.
I have a very interested professional animator prepared to continue animation to a 'pilot' length.
As sole distributor I would like to approach TV companies with a pilot length animation of the products I am promoting and selling.
If animation accepted by TV company, who owns rights to it......the original 30second animator?....the animator who lengthens it to pilot?.....the creator of original/copywrite idea?....me,who provides story board and commisions 2nd
animator? or TV company?....
Can anyone tell me how this works please...also, does the TV company buy the animation if they want it....should they want further episodes. who would pay for that? Are their Royalties involved?...if so,who is entitled?
Help please.