The second photo is typical of clothing in the early 1860's. I have a picture in one of my clothing books that shows almost the identical suit dated 1860.
The second photograph is likely 1850s-early 1860s as it appears the trousers are of the broad fall kind which were mostly replaced by mid-1860s by the French or California fly. By magnifying the photo I'm pretty sure I can see the multiple (usually three) buttons of the broadfall trousers. The squared toes of the shoes are also indicative of the 1850s-early 1860s as does the position of the frock coat sleeves where attached (not on top of the shoulder as in more modern coats).
The rock house photograph could be any time between late 19th and early 20th century although my best time guess would be between 1910-1930. The youngest child seems to be wearing the sailor-inspired clothes popular for children at the time and the older boy in the flat cap "may" be wearing a jumpsuit. I couldn't make out any belt or suspenders on him, but that may just be the blur of the photograph. The men without coats and the short sleeves of the woman holding the youngest child suggest the casualness of 1910s-1930s, too.