The attached link about Leonardo da vinci may provide you what you requested
You can use any colours you'd like, as it is an expressionist portrait. Play with it and find something you like!
you can check on Google.com and type up how to draw.
Study the book Draw Like Da Vinci by Susan Dorothea White. This book has over one hundred and fifty images. The fundamental drawing principles that Leonardo da Vinci used are explained comprehensively, as well as his tools and techniques such as silverpoint. There are projects for the reader to work through, such as drawing a 'sfumato tomato', portraiture, and drapery. The author analyses Leonardo's artworks and reveals the skills behind them.
There are some Renaissance portraits of Dante, but I can not find any reference to one by da Vinci. Check the link below.
their is no portrait
You can find a freelance portrait artist to draw you a personalized portrait and send you the high-resolution file for you to print by your own where you wish. This is actually the cheapest and the most convenient way to get a portrait. I personally oder portraits from a freelance Ukrainian artist and illustrator at http://igor-lukyanov.blogspot.com
easy find it out for your self
Portrait Photography Reviews are not easy to find online, but there are websites such as Digital Photography Reviews that will allow users to rate eachother's photographs. Sites like these can be found online through terms as 'Portrait Photography Reviews' and will allow you to view the best photography available on the internet!
Learn to draw easy monkey step by step with Kids Fun Learn Club. They draw super amazing drawings, that very easy for kids and beginners. You can find their videos on YouTube and also they have their own site in same name :)
A device used to draw parabolas. There are sketches by Leonardo da Vinci of a device that was supposed to do just that, but I can't find evidence of a working model.
because it is non moving and will remain the same as you draw.
Find a book on Victorians and settle with a picture in the book that you think will be easy to draw. The either trace it or have a good go. If you don't think it looks great, try and find a website that will help you.