first of all, i think alot of your questions come from a missunderstanding of free sites... a free site isnt just a site that is free, the one you put in your post doesnt look bad, but if you are looking to use recip management and flexibility it makes me think you are planning on working on it and updating it over a long period of time. imho free sites should be built and forgotten about because the time it would take to update that one source of traffic is more time than it would take to build more sources of traffic over the long term... however, with that said i will try to answer your questions:
1st - there isnt really a standard free site rule document because all linklists are different, however the "standard" more or less is
http://www.link-o-rama.com/greenguy/newrules.html but if you throw on there no blind links, no free hosted sites, no free email addresses, then you pretty much have the basic no nos on every site although some will have rules as to popups and fpas and pix on html pages etc.. so read the rules of any linklist you submit to.
2nd - no it is not required, but why would you want to have more than two galleries? all that does is give away more porn so they are less likely to buy, not to mention it uses half again as much content which would be better used on more sites imho
3rd - this one is a bit tricky becuase it depends on the reviewer and how they define things, but for the most part (and no its not per domain its three ads per page) they are talking about ads which go to sponsors. one link usually dosnt equal an ad, it usually means a spot on the page that is trying to attract them to click and buy something, however if the one ad spot with three hrefs on it go to three different urls then it is three different ads, while that same ad spot if it had three hrefs all going to the same url then it would only be one ... like i said its tricky cuz its hard to explian and the definition changes with any list you submit to.
4th - see what bill said cuz i would prolly just confuse you LOL
5th - i personally dont know of many linklist that have specific rules on this, but if you do have an exit link i wouldnt link it to another adult site... they wanted to leave. i also wouldnt link it to google or disney or whatever either cuz they get enough traffic without your charity... find a mainstream sponsor who will make you some money on the little traffic that does click the exit link
6th - more or less you are correct... most dont put them anywhere but on the index/warning page because having them on other pages will make them too much of a traffic leak... those pages you want to make money on
7th - again it depends on the linklists, some wont have a problem with it some will, however that is why most of us mirror the site or the index page and submit to mulitple linklists that way
hope that helps
