This is only the Index so the information will only give the head of household. No children or spouse are included. To be honest, Ancestry.com will provide more information. However, sometimes it is nice to have a list of all heads of households with a specific last name.
The photo below shows the second half of the listing for the VanHorn family. For example, Robert VanHorn, age 70, appears on the 1870 Census. From the index, we can see that he is married and we can assume that his wife is living since a few entries below has Simon listed as a widow. Robert was born in Pennsylvania. The rest of the information in the index is where to find the actual information.
If you are interested, simply either comment here or email me at firstname.lastname@example.org.