Dared touch him.

[tufguy]

Tom was very surprised on being punched because nobody had ever dared touch him.

Have I used "Dare" correctly?

 

[tedmc]

Tom was very surprised [STRIKE]on[/STRIKE] about being punched because nobody had ever dared touch him.

Have I used "[STRIKE]Dare[/STRIKE] dared" correctly?

Yes, you have.

See above.

 

[emsr2d2]

You could also start with "John was very surprised to be punched ...".

 

[probus]

Or "John was very surprised at being punched...".

 

[Tdol]

You could also say dared to touch him- both are fine.