I have an Oregon so I'm not positive it's exactly the same:
How do you create/type a space
On the screen with the letters near the bottom right corner of the grid there is a symbol that looks like a square bracket ] laying on it's side
, a capitalized letter
same screen as above in the right bottom corner of the grid there should be an up arrow (if caps are showing it will be a down arrow which will change to lower case).
and a hyphen on the Garmin 62s?
Use the minus key on the screen with the number grid. You can change between the letter, number and special characters screens by using the left/right arrows at the bottom of the screens.