Boost depends on what title to who do you want to climb =)
Also don't forget teach shooting pretty badass only grenades and so on.
Payment for boost and tuition are separate.
The price for the boost indicated on the picture.
link https://vk.com/csgo_as_boost_gaming?z=photo-151126631_456239036%2Falbum-151126631_00%2Frev