There are Medicare Advantage Plans that include dental, vision, hearing but they are through a private insurer and will cost you more than plain Jane Medicare.
Research these plans thoroughly before you join.
Step 1 is to visit your local Social Security Office and apply on or before you turn 65.
As mentioned, you will be penalized if you don't carry a qualified insurance plan and then try to get on Medicare later. It keeps people paying into the system whether they think they need it or not.
Past 65 you will be covered or you will be penalized.
You can get the ball rolling at medicare.gov
