All important questions! (And I suggest a good argument for those currently against PtP in other threads - I’ll come to that after answering your specific questions though).
Yes, it will be easy. Static html websites can just be uploaded directly (even now there is a demo_app that does just this, though with some alpha bugs). Dynamic websites are a different question because there is no server to run PHP/sever side scripts. For more on that, see the links posted above and indeed SAFEpress.
I’m guessing your website is not static html, so will not be that straightforward, unless you could convert it. I’m sure to start with lots of people will generate static versions of existing websites until this issue becomes clearer and new solutions like SAFEpress emerge.
There is nothing to stop you embedding Adsense at this stage, but there soon will be, and you will find yourself exposed to bad press from the natural followers of this project, because to allow it undermines the privacy, security and freedom goals of the network. Which is why there will no doubt be a browser that will not allow those links (or any other linked to the old web - only requests that go to SAFEnetwork). Users of that browser will not access or see adverts or any other content outside SAFEnetwork.
The good news about not having servers is that your costs will be much much lower, because you won’t have to pay for running them! You will pay only for the initial upload of your website, and when you upload a change. These fees will be very competitive, but are set dynamically by the network so we can’t give you figures (and they will be paid in Safecoin to the network itself). Also, no matter how popular your website gets, it will never fall over due to demand because SAFEnetwork acts like a content delivery system, at no extra cost to you. No DDoS attacks (or hacking of your servers) ever!
But you will still want to monetise! This is where PtP (Pay the Producer) comes in, a contentious proposal because some feel strongly against it, and others strongly for it. For this reason it will not be implemented initially, but will be revisited later, and may be added after all the essentials are up and running, precisely because it provides a great alternative to all the existing models for generating revenue, including advertising that few people actually like. I think most people here agree that the existing models are not working well in terms of producers or consumers, because they allow for centralisation and control by a small number of big corporations who can then manipulate them for profit, at the expense of the majority of producers and consumers. But not everyone thinks SAFEnetwork should attempt to deal with this, though I’m not aware of any alternative proposals that could.
In a nutshell, PtP works analogous to farming Safecoin. Farmers are people, many ordinary individuals, who provide the physical infrastructure of the network by sharing some spare disk space and bandwidth from their computers, allowing the SAFEnetwork to function.
Farmers get a chance to earn Safecoin every time a chunk of data they hold is retrieved and sent to an end user. In SAFEnetwork jargon, there is a “farming attempt” for every “GET”.
If we implement PtP (Pay the Producer), whenever a farmer gets paid for delivering a chunk, a smaller amount of Safecoin will also be paid to the uploader of that chunk. Since the rewards are linked, the uploader would get about 10% as much as a farmer gets, but the absolute amount will depend on how much the network has to pay to obtain resources from farmers, which is designed to fluctuate according to supply and demand. It’s a farmers’ market, boom boom! 
There is another, also contentious, proposal for PtD (Pay the Developer), to reward developers of popular apps.
Hope that helps. I’d love to see your website be there when the network goes live. It will be a crazy time 