As to the 2nd part of your question you need a DVD authoring program to burn
the movie to DVD.
There are many to choose from and most offer a free trial to help you decide
which you prefer.
Some recommend Sonic MyDVD (a program I personally can't stand) and others
recommend one of the Ulead authoring programs (products that I love and use
all the time) I have a list of most of the more popular programs in the "DVD
Programs" section on my website along with links to author's pages for
downloading.