A money cheat in Runescape or a good way to get money if your a level 4 non member archer?

Answer 1

money cheats can get you banned from the game instantly (runescape updated stuff)
but a good way to make money is to cut yews, you can also use fishing with lobsters+ to gain money.

Another alternative to get money is mining. Once you have some money, you can also try market speculation, called "merching" by most players - try to buy things cheap and sell expensive. However, this requires some experience; you can gain money, but you can also lose money.