Went out and brought cologne

As recommended by everyone here, Giorgio Armani, Acqua Di Gio. $150 AUS for 200ml bottle so hopefully will last a while. Came with 3 small extra bottles, a 'All Over Body Shampoo, small bottle 'Pour Homme,' and 'After Shave Balm.
Few Questions that Id appreciate answered
What is the All Over Body Shampoo used for? Is like body wash liquid and used the same way?
Because I hardly need to shave (Im 19 but I guess its because Im asian) because my facial hair doesnt grow that fast, should I still put on the After Shave Balm or is that just a waste unless I do shave. Also, how do you put on aftershave, dab lightly?
How to apply the cologne? Its a spray on bottle so spray into air and walk into it? Or spray onto hands and rub onto neck etc? Id say neck would be good for when girls kiss on the cheek.
Does smoke ruin the smell of the cologne or will people still be able to smell the colonge over the smell of ciggerettes.
Theres a few more questions but I dont want to post them all in one post
Thanks in advance for replies and answers, all much appreciated.