1. The two filmlike settings are supposed to look like a film. One is with hi contrast, the other one is low contrast. Test them and pick the one you like is the best solution.
2. To slowmo go 720p 24pn then go to your scene file and set it to film mode and 60 fps. No sound will be recorded.
Although you can use either for whatever playout you're intending - CineV is optimised for TV based playout - higher contrast for rooms that may not be totally dark. It also has slightly lower (horizontal?) resolution for less flicker and a less detailed look.
Cine D is much the opposite, designed for dark rooms with higher resolution, playout systems. Most folk appear to prefer to work with D and grade as necessary as it gives you maximum picture information. There is extra noise in D though over V.
V looks instantly more appealing due to the contrast curve, but you could end up crushing picture information needlessly.