1. No the every object comes in color when you use it in reports i want to ask which version you are use or check your settings.
2. For Header and Footer i suggest you use Text box and images for this type of representations or when you add a image box you see you have small black squares arround the image box just click and drag it and change the size.
3. For this save the document as Qlikview Pdf and i let you know.