Fighters/Heroes are damage dealers.
The Ascenscion updates have given Heroes a tremendous skill boost and they're around the top in terms of DPS.
However, they grow very slowly. You won't start to see or feel a Hero's real power until level 150-160.
Pages/Paladins are super tanks. You will never die.
However, they don't have much offensive skills and their damage is mediocre.
They are sought after in boss runs where there is seduce such HT, CHT, CZAK and PB, because they make excellent seduce mules.
You can most likely earn yourself a free CHTP or CZAK Helm by just being a seduce mule.
This. Don't worry too much about money or funding.
Cash starts coming in when you start bossing frequently, which is around mid-4th job.