You aren't currently paying for any additional advertising with Trulia at this time. If you want to expand your presence on Trulia, you'll want to check out Trulia Pro and Trulia Local Ads. Trulia Pro will give your listings more exposure and help you bring in more leads, while Trulia Local Ads will help you build your brand in the areas you choose with customer banner advertising.
You can see more product features for each at the links below, and you can call our team Mon-Fri 9AM to 7PM EST if you have any questions.
I hope this helps!
Hopefully you are getting results from this site. I assume you are since you are wanting to expand.
Best of luck from Boise! My youngest son is up in your neck of the woods this week attending a basketball camp at Gonzaga. ;-)