While developing for Ethereum and using the testnet you'll need Ether to get things done. You can mine for it of course but there are sites called faucets that will send you Eth for free.
I found the following one today and used it a few times to get my balance in shape to do some testing.
Throttled Testnet Faucet
To very the transaction after you use the faucet visit the Block Explorer at the following link.