Chaos Druids are good for combat. Long term you do slayer tasks because it unlocks money makers at later levels.
Cannonballs, Gold Bracelets, Cleaning Herbs, and doing agility rooftops to sell Amylase, are all good ways to make slow money while levelling up your skills.
Best moneymaker is to do services for other ppl

*EDIT* Actually the best moneymaker is to get a job IRL and buy bonds.
This post was edited by Cowler on Dec 2 2018 07:15am