1. The best option I can think of to show the name of the hierarchy in the view would be to rename each hierarchy member with the hierarchy name before the rest of the dimension name.
2. What do you mean by giving each member of the hierarchy a different color?
3. To show all the children of a given hierarchy, the plus signs will need to be clicked or the children of the hierarchy will each need to be placed on the view directly from the data box.
Hope this helps!