Just a question in the fuse box on the Skoda mark 3 2019 I have what is referred to as non assigned fuses  I believe we have three different areas in the fuse box what does that exactly mean are they fuses that you can tap into question 2     12 volt power socket fuse in the fuse box can that be tapped into two if I want to put in an extra light    with an adder fuse

For your purpose, you are either looking at mini or micro blade fuses.  You need to get out your manual and see what the fusebox gives you (you will need a magnifying glass to look at the diagram). 

It depends on whether you want a switched or a non-switched feed as well.  You can definately split the feed into two.  What systems did you have in mind?  Was it for a Dashcam?