Is there any guides that could help me for what I need to bring with me to DMV office?
Yes this guide will help you with the proofs of identification you need and also bring your proof of honorable discharge original or photocopies.
What type of discharge form do I need if discharged before January 1, 1950?
You would need an Honorable Discharge form WD AGO 53, 55, 53-55, or NAVPERS 553, or NAVMC 78PD or NAVCG553, or Enlisted Seperation Paper.