Freezing Pulse ? Projectile or spell ?

How to rise up freezing pulses damage at passive tree with projectile damage, elemantal damage or with cold damage ?

All of those would work. :)

To expand on that answer, because I bloody feel like it right now! ...:

Freezing Pulse is a Spell, and so Spell damage applies to it. The function of this Spell is to create a Projectile, which means Projectile damage applies to that projectile. The projectile in question deals Cold damage, which is increased by Cold damage passives in the tree.

If you look at the Wiki page for Freezing Pulse (or an in-game Freezing Pulse gem), you'll see it has those three tags: Spell, Projectile, Cold. In general, any modifier in the tree will apply to any gem which has a matching gem tag. This makes Freezing Pulse fairly easy to scale damage-wise, which is why it's still a semi-relevant skill these days.