Mining is one of the most vital skills in RuneScape. Everyone should have at least 40 Mining, so here's how you can level up if you aren't already level 40. You may also want to bank the ores later.

>From level 1-20 mine Copper from the South Varrock mine.
>From level 20-40 mine Iron from the mine near Rimmington or Varrock.

Now that you have a Mining level of 40, it should be easier to mine Coal. Even though you only need 30 Mining for Coal, it would be much more difficult to mine it at that level. You should also buy either an Adamantite or Rune pick.

For Members, a great place to mine coal is at the mine near Ardougne, and a bank is nearby. Free-Players can mine in the Dwarven mines, but there isn't a bank very close to you.

Now mine 4,731 coal and sell for around 100-150gp each, or keep them for Smithing.
You should be at level 60 Mining, which means that you can go inside the Miner's Guild.
Mine 59,598 coal and sell for around 100-150gp each, or keep them for Smithing.
Now that you're level 85 Mining, you can mine Rune in the Wilderness, or from the Heroes Guild. Each ore sells for around 10,000-15,000gp!