We have free and we have commercial templates. For the commercial templates you have to purchase a membership.
All membership plans are listed here:Youjoomla Signup
Membership plans are the most rewarding way of obtaining our templates, since this will give you access to all templates and extensions and will also give you access to our support forum.
Alternatively you can buy a single template, this you can find here: Youjoomla Signup
This is slighter cheaper than the membership plans, but will only give you one template. If you have any more questions regarding membership please ask.
Now to your specific questions. Both with any of the membership plans and the single template purchase you will get access to a demo installation. This is an exact replica of what you see on the demo server, so you will get what you see.
Free download of our commercial templates is not possible. I can only advise you to try one of our free templates to get a feel for what is what. If you decide to buy a membership you will be acquainted with how things works with the added bonus of all the extra template feauture of our commercial templates.