Biblical texts make clear that marriages between cousins were strongly preferred.
Marriages with non-Israelites are treated differently by different texts.
Most likely, girls were married around puberty whereas men were somewhat older.
Though unions were generally based more on economic or social considerations than romantic ones, some texts, including the Song of Songs, show us that ideas of passion and sexual love were also present in ancient Israel.
Though some people think of the betrothal gift as a purchase price, this is inaccurate.