Additionally, if you've got an RS Freeplay Status, you won't be eligible for a clue scroll. They are only available to members. But, I'll presume that you haven't changed your status in RS.
Runecrafting is my favorite way to make money. Even if you can't craft the higher runes yet like natures, making airs in lower levels can be lucrative, but for a while it would be slow and boring work. You can also improve your woodcutting skills up to level 60. This involves cutting willows with a Draynor, and cutting yews. They're quite quick and easy to make money.
You'll need two prayer potions to help you cross the island. Also, bring 4 anti-poison remedies to safeguard your body. Cammalot Teliportation Runes are great to use when you aren't eating enough food.
4 prayer pots, 4 super-energy potions, two anti-poison potions, and the rest that contain food are needed for underground (as long you don't let mellee get in your way). Keep an eye on the run. When it is lower than 50%, you may take a couple of extra run energy. When prayer is at 28%, you can take a prayer drink.
One anti poison (for fighting in the middle the jungle) and Camalot Teliportation Runes (for fighting or in the event that you remain alive: cute;), 4 prayer pots (4 over kill but better safer rather than sorry) and the rest of them with healthy food.