Answer:
I have three heads. Cut off one I become stronger. Cut off two I become ten.
In prison I'll be found. But I would never go to court Unless there's more than one
Man walks over, man walks under, in times of war he burns asunder. What is it?
I am a word of letters three. Add two and fewer there will be. What word am I?
I have keys but no locks. I have space but no room. You can enter but can't go outside. What am I?
A first job for many kids, this could be described as "Media Distribution Management.