Those are called window shades, some cars have power ones, really? You can't use them on the front windows, and unless you've got little kids and you're one of those freaky paranoid kinda parents, I don't see the point to them
No, that picture shows a unit that sits on the window sill, eg doesn't require cutting, just sticky tape. Unless you want to hide it, but that won't look perfect either anyway.
A more common option is to just get tinted windows
