#1 Interestingly enough that Pentax pioneered spot metering but didn't put it in production until the modern film cams. Backlit subjects always requires +compensation depending on scene and taste. Fortunately, most all C41 can withstand gross overexposure and still provide useful results.
#2 Lighting temperature compensation is conducted in post. PS has built-in filters and most all post tools have white balance for the quick approach as shown below.
#3 Vivid is of course dependent on the lens, scene lighting, scan and post work and is the easiest to adjust to taste. Below is backlit Fuji Fortia which is naturally vivid with a particularly vivid scene.