1. He just added those diagonal scanlines and changed the opacity level, that gives it that look.
2. Download that particular pattern, or make it yourself.
Second signature.
3. Probably grunge brushes, on the left side, that is just a c4d render placed into the sig, those are not even close to being pleasing signatures.
Do not look on adobe's official website for tutorials, look for them at www.good-tutorials.com or www.pixel2life.com