Squid can be eaten raw, though the taste and the texture do not appeal to many people. You will definitely want to make sure that you cook or fry your squid before eating it, especially if you do not enjoy the taste of raw squid. Many people however do enjoy the taste of raw squid sashimi-style in restaurants though some do not.
You will find that there are going to be many different types of recipes that involve squid, most of which require it to be cooked though. If you enjoy eating raw squid, it is recommended that you do so at a restaurant where people in the kitchen know how to properly prepare it.