hi i am new and i dont know what character to start with
and how should i use my stat and skill points?

Mage is an ideal choice easier to level, gets in aoe mass mob kill parties easier.

Fire 1st then switch to Ice at lvl 60. Ice gets into harpy parties easier =)

use rambo

yes mage is a good option

y is no ever on KO?

Mage or Rogue tend to be fastest lvlers if soloing.

however, priests are needed in every exp party.

KO should be more introduced to D2 players. It's a great game.