The $25 gift certificate, plus the 500 points ($5) you get for registering at the store site is enough to cover the cost of 2 to-go sized products.
You might also want to try instant Gentleman. It will give you an air of confident maturity, you will be perceived as a guy who knows whats going on, a guy who can handle whatever comes his way.
My votes, Instant Honesty and Instant Gentleman if you get just two, Instant Openness for a third.
As for how many sprays, everyone is different. This post should help you familiarize yourself with the products once you get them: How To Find Your Sweet Spot (How to find your sweet spot...)