I think I speak for everyone when I say that being poor in runescape downright sucks. I mean it's no fun getting called a noob based on your amount of money so I made this help full guide to help you get rich.
There are several different ways to make money on runescape ranging from merchanting to player killing, and all of these methods work quite well. First I will start with the most basic way of making money…player killing. I recommend getting your player to at least combat level 30 before you try this. To start raise a characters stats in such a way as to make him look weaker. for example. Player a has 15 defense 15 strength and 15 attack so he is level 17, while player b has o defense 20 attack and 18 strength and he too is level 17. chances are player a will be destroyed in the wild. the reason player b would do better is because player be is a pure which is someone who raises attack and strength only to make themselves appear weaker. When you raise a strong pure character I recommend going to edgeville and trying out your skills. Buy the best weapon you can use and some decent food. Which means no shrimp. Fight and do your best to defeat your opponents and get there stuff which you can then sell or give away your choice.
The second way to make money that I will discuss is using your skills. Get a skill very high like for example if you get your crafting up high and you can cut gems then you can cut and sell gems for money. There are 3 main ways to make money in this way mining cutting wood and fishing. If you plan on mining then I suggest you pick up your bronze pick and head out for varrock. Varrock features several easy places to find, mine and bank ore. Which you can then sell or smith. As you progress in this manner keep in mind that there will be players out there trying to steal your ore so don't fall for it. Always check a price guide before you sell your ores. If you choose to cut wood then congrats you chose the easiest way to make money, although it gets quite repetitive. First cut regular trees and drop them when you get a full inventory so you don't waste time banking worthless logs. Continue on in this fashion till you are about level 15 wood cutting. Now you can cut oak same as before cut wood drop repeat. When you eventually get high enough wood cutting to cut down yew trees now you have made it. Bank these each and every time you cut them. You will quickly get a large amount of logs which you should then sell to other players. As with the ore do not let your self get robbed of logs.
The third and final way to make money is (drum roll please) fishing. You can not only make a massive amount of money this way but you can also catch your own food. Fish with a net in lumbrige till level 10 fishing then proceed to draynor village. Try to get a hold of a fishing pole and about 500 bait then catch and drop fish till you are level 35
Fishing. Now its time to play with the big dogs. You must now go to karamja and catch tuna. As before fish and drop you will now be gaining vast amounts of fishing exp in a short amount of time. When you are level 40 fishing you will be able to catch lobsters wich will make you a fortune. But remember DON'T GET SCAMMED OUT OF YOUR HARD EARNED FISH