How do I convert Bitcoin to and from my local currency?
You will need the aid of a service or individual in order to exchange fiat currency to and from bitcoin.

You will also need a bitcoin wallet.

Some services offer both exchange and wallet functionality.

You may find these resources helpful:


How does one acquire bitcoins?
How to buy bitcoins (Lists of services available in many countries)

For the United States: http://howtobuybitcoins.info/us.html

Trade (A list of many options and services)