Either one would work. The colours look great. You could change the bag depending on your mood/outfit/season. I have the LC Cuir and I love it as a work/every day bag. I have a separate tote for laptop and files.
Depends what work you do.
And what you need to carry.
Tbh, these colors would not look "professional" to me.
Again, depends.
Cuir = yesI know, the bags are pretty colourful. Are they suitible for an office interview?