Level 11. I'm just going through the Misc. missions right now. I sold the vampire armor I had and the cultists robes and my bow and arrows. I'm trying to raise enough money to buy a house in Whiterun right now.
Loot everything. pick up all the gold you see on anyone you kill, check every chest for gold, pick up anything with a hundred gold or more to sell it. Don't buy anything except health potions, if you need arrows, pick them up any time you see them on the ground.
And now, Shadowman's totally awesome money-making stat-raising method:
Step 1: Find the Transmutation spellbook, you can find a copy in Halted Stream Camp.
(And get VERY intimate with that site, it will tell you all you need to know and then some) This spell will turn Iron Ore into Silver Ore, then Silver Ore into Gold Ore.
Step 2: Buy all the Iron Ore you can (NOT iron ingots!) and mine any vein of it you see. (iron ore is very cheap, a mere 6 gold even with low speechcraft) Transmute the hell out of it, then smelt the Gold Ore into Gold Ingots. This will raise your Alteration stat, evenif you don't use it, it puts you that much closer to level-up.
Step 3: Take those gold ingots to the nearest Forge (There's a smelter and forge next to each other right inside Whiterun) and make a metric assload of Gold Rings. This will raise your Smithing skill by a healthy amount.
Step 4: This part is optional, but if you have any Soul Gems, try enchanting the rings. it'll increase their value and increase your Enchanting stat.
Step 5: Sell 'em, sell 'em all to whoever will buy them. This will increase your gold, and Speechcraft skill.