There is a lot of ways to make money on runescape.
I do think that its batter to not brake the rules. So the easy way to make money is ----
Here is what u have to do
u need to have 50k then go to world 1 (so hard to get in there)
Then go to varrok west bank and using auto talker(*unless u are too bad at typing*) keep saying buying Rune 2 scimitar for 25k and pay 50k for 2.
Then go to world 86/ 87/38 and sell them for 30k ea ( people may say that thats rip but do not listen to them )
U will make 60k out of 50k then keep doing it.
U will make 100k in 3 hours
And it will take no more then a day to make 1m easy!!!
$$$$$$$$$$$$$$$$$$$$$$$$ Another way is getting coals..
Go to falador and go down to the underground where people mine
Then Buy coals for 20 ea
Sell them 150 ea (best if On world 1-7)
U will make 130 profit per coal
get it