The French First Republic was from the French Revolution up until Bonaparte takes over. The French Second Republic was from the end of Bonaparte's reign until the beginning of Bonaparte III's. It began in 1848 and ended in 1851.
Legislature was by the National Assembly, which was a group of 750 elected by the people. The Assembly would then elect members of the Council of State. Assembly members would serve 3 year terms and Council members 6. Laws would be created by the Council and voted upon by the Assembly.