Is it true that with LaTeX, I don have to worry about page numbering and margins?
Yes. LaTeX will number your pages and your sections. It will also generate your table of contents, as well as lists of figures and tables. It will format your bibliography for you. You can even change from single to double spacing and LaTeX will renumber your pages and redo your table of contents, list of figures, and list of tables automatically. The Graduate School accepts LaTeX submissions. Simply submit the DVI file (output of LaTeX) and any graphic files you have used.