If I were you, I'd start out doing green dragon camping for a bit until you can afford decent gear for frost dragons then move onto those. Proper gear at frost dragons can make up to 3-4m an hour.
Do barrows... its extremely easy with that account. I have a lvl 134 and I can make about 25m a week sometimes more sometimes less. You could alternatively do some skipping but its really not worth it for cash.
Do Abbys and get Whip drops, also might want to go to Dark Beasts that drop Dark bows. Ice strykewyrm's are also available to you, they drop Staff's Of Light.