Woodcutting, fishing, hunter and mining will make a nice profit if you sell the materials you gathered whilst training the skills. Training agility will only make a small loss because of the small amount of food you will require to heal up when damaged by obstacles, but agility is a tedious skill to train.
Cooking, Fletching or Firemaking.
I believe it is fletching for members, and cooking for non-members, that are usually considered the fastest skills to train.
Wood cutting. In my opinion, Prayer is arguably the fastest skill to train. However, Prayer is also very expensive. The same applies to Herblore and Construction.
you cant
the fastest skill to get is fire making you can get from 44 to 99 in 89hours with maples. Just saying um.... Hunter you can get done within 4-6 weeks for 1 hour a day. 89 hours= 89 days for 1 day longer....... So your wrong pal.
For a good Runescape help site, sheck out this site It gives great tips and A skill guide for every skill is included http://runescape.salmoneus.net/hunter_help.html#level1
The faster the skill is to level the more gp it costs, fletching, cooking being the fastest.
Mining, fishing, and woodcutting can all get you decent amounts of money.
A quest on Runescape is an adventure that puts you in a conflict, you solve it and you get rewards like money, skill experience points, quest points, and items.
Keep playing. Try to get more xp by kill and skilling.. BTW its max in 120 level.
Slowly and maturily your levels will advance. Set goals and go for them, its the fastest way to master all the skills in Runescape.
maybe steal and use thieving skill