how do you advance passed the third level

I can't advance to 3rd barron my prestige is almost three times the requirement and I don't know what wood x1 means

Not sure what you mean by wood times one... but you're gonna need a nugget to get to third baron. get one from the market, with coins, out of chests or from a hunt. you'll need more troops to get one from a hunt though.

I'd like to add that you can get a nugget from a box as well.

However, there is a very easy way to get a nugget. If you want to do it.
Sell your free Enhancement Stones you get from the start. Then buy a nugget from the market. Its your choice. I'd sell them though, as likely it (Depending on market prices) let you also get 2 nuggets. (Or 1 nugget and a gem if your lucky)

But, if you don't want to do that, you could always try asking in WC every hour or so. If you get lucky someone will sell you one for cheep.

Best of luck to you.