How to hide time signature for one instrument and add system dividers

Hello everyone,

I’m working on a score and I need some help with two things:

Is it possible to hide the time signature for just one instrument while keeping it visible for the others? I’ve been trying to figure this out but haven’t had much luck so far.
How can I add system dividers between the systems in my score? I’m looking for a way to make the score more organized and visually clear.
I’m using MuseScore version [your version] if that helps.

Thanks in advance for your help!