Trulia is not a real estate company with agents, they just advertise property.
To find out more information on the home you've found, use the agent tab at the top of the page and find one in your area. Call them, giving them the property address and they can tell you: the rent, deposit, move-in date, application fee, and of course show the home to you.
On the other hand, don't be surprised to find the home doesn't really exist. Unfortunately there are a lot of "spam' listings in the rental section - so never send money to anyone - not knowing who they are.