Obtaining a phone number

All,

I’m a total noob to telephony, communications, pbx.

I am a systems admin / network win/linux so I am familiar with the environment and what’s going on. Installation went fine for me.

My system is up and has been running for 41 minutes.

Question:

How do I obtain a phone number for inbound calls?

Do I still have to pay for monthly phone service; when I obtain a number?

will adding PSTN and SIPs to the trunks allow me to make unlimited outbound calls?

I thought that asterisk and free PBX would allow me to have a phone system at no cost, or monthly cost.

We offer SIP service with unlimited inbound and outbound calls on a per channel basis. SIPStation.com is the service and its owned by the same company that maintains and build FreePBX.