I wanna know some websites for genealogy that are free. They have to be good websites. And it has to give good information on my ancestors (such as eye color, hair color, i.e.).
I would be very grateful.

http://www.cyndislist.com/
the classic encyclopedia of genealogy sources (great beginner section).
As for appearance.. your best source on this is immediate or extended family, that may have old pictures. Older ones won’t be in color, of course. WW1 draft registration is one that has description.
And everyone wants free. There are some costs to research. Ancestry.com has the best collection of census records, so forth (draft cards are from there). If you want GOOD research, you will find that it is well worth the cost.