Question

My question is how can I crossover and make a spin move or more accurate which are the buttons to do that.

You can't do crossovers accurately like the one you use to do in 2K10 by pressing a 'crossover' button, you have to master the proper rotation and timing of the left analog stick to do specific crossovers.

so lets get it str8...if I am playing with keyboard there is no possibility to make a crossover or a spin...

You are correct. A winner is you.