If the video of the link above doesn’t help you, here’s the codes Sketchfab provides with its solutions:
Codes Sketchfab
For the baking, there’s a couple of courses where baking takes place, you can watch this example on Pothead:
https://cgcookie.com/lessons/final-touch-up-and-baking
Or various lessons on UV unwrapping here:
https://cgcookie.com/lessons/the-uv-editor
