Is there a built in feature that allows us to display Rules/Guidelines to a specific section of the forum, where they would have to agree to before being able to create a new topic or post?

 

I know of then paid way to do it. 

 

 

Is there a built in feature that allows us to display Rules/Guidelines to a specific section of the forum, where they would have to agree to before being able to create a new topic or post?

Not a.f.a.i.k. You can request one though at the Feedback forum and hopefully it will be taken into consideration.

https://invisioncommunity.com/forums/forum/499-feedback/

Is this pertaining to terms of service of your community? Would not place this in your site's TOS? There are means to require people to agree to changes in your community's TOS but there are no means to allow for agreeing to forum rules.