Most of the demos are all fully functioning, except that they render a watermark onto your footage so that it can't be used in a finished produciton. VideoWrap is limited to 10 second samples. In other words, the demos can be used to fully assess the programs, but they can't be used to create final content.
We can't really tell you what package you can get as we don't even know what you want to do. Our products all do extremely different things, so you'll have to give us some more information first!
You can also find lots of information here: http://fxhome.com/products/