To Legends Rome was founded by Romus and Romulus, 753 BC.
In fact in those years Etruscans and Latins live in Rome. When Rome established it was a small kingdom. But there were some political and social structurings.
Senate was advisory board of King. Only Patricians can be a member of Senate.
Social Life: In ancient Rome there were three social groups.
Patricians: They were powerful class of society. They have social and management rights.
Plebs: They haven’t any political rights. They couldn’t marry with a Patrician.
Clients: They haven’t got any rights. They were slave of Patricians.