There are plently of websites with free info, the problem is that most have information for pre-1901.
Family history is NOT a cheap hobby and anyone that thinks they can do it on the internet for free is sadly mistaken.
If you are lucky enough to live in the area where most of your ancestors came from, a trip to the Records Office or Archives can save you a fortune. Even if you are not in the area, large libraries usually have subscriptions to the main genealogy websites so you can use theor computers and access the info for free.
Ancestry is the main one and costs �80 a year - in my book, this is worth every penny but most large libararies have access for free.
If you are serious about this, at some point you will have to fork out for birth, marriage and death certificates to prove relationships, and at �7 each it soon ads up!!