Using a scroll doesn't take any material components. Instead, these were used up when scribing the scroll. However, other than that the book isn't exactly clear on what one must provide in order to use a scroll.
I am not talking about the requirements to be able to use a scroll. I am talking about what is needed to actually use it. For example, does a scroll still require verbal and/or somatic components? Is use of a scroll always a set amount of time, or does it take an amount of time equal to the casting time of the original spell?