Here is a site with basic instructions for a classic homemade Father Christmas costume.
Link: http://www.startsewing.co.uk/howtomakefatherchristmascostume.html
Homemade Christmas Costume Ideas
Making a Robot Costume
Mary Poppins Costume
Adult "Christmas Story" Bunny Costume Pattern?
Halloween Pet Costume: Minnie Mouse
Costume Ideas for Someone Who Loves Fantasy and Computer Games?