What do movie people do to create a setting? What tools do they have? Are those tools available to authors?

Movie people are able to write up how they want a scene to look like, then they can use things like backgrounds and crops to make a visual representation of how they want their scene to look like. Authors don't have things like props and backgrounds, so they have to put a lot of detail into their writing for readers to visualize.

the right ones are in bold.

daintly refers to the fact she was reaching for what she ate, not necessarily what she is like.

greatest charm as in she possessed (=had) the greatest charm.

pleasant (her demeanor)

speaking (of her sensibility)

dead refers to the hypothetical mouse.

bleeding refers to the hypothetical mouse.