Welcome to all new players, I'd start off by saying, the best way to make money from the start, is skilling to get 99's, every 99 gives a crystal key, (make sure you have at least one space in your inventory, or else you'll lose it, and we don't refund) they sell for 100m each in shop if you don't wish to open it. If you're not into skilling, thieving is also a way, I'd say it's a little slower way though, bossing, slayer is also a really good way. If you're wondering what bosses drops, check some other guides I've made drop-list guide. Got any questions? Don't hesitate to PM/comment 
