Hi, anyone know what font this is?

Thanks

Helvetica Neue Condensed Black  Vorgeschlagen von rocamaco 

And how would you make it just the outline?

in photoshop:

- right click on the layer and select 'blending options'
- under 'Advanced Blending', reduce Fill Opacity to 0%
- add white outline by checking the stroke option and pick white for colour.

you're done.