Short answers, pulled from the story.
The Vichy French Navy scuttled 77 vessels including three battleships and seven cruisers to prevent their capture by German forces. This action ended friendly naval cooperation between Axis powers and Vichy France while leaving the harbor polluted with oil for two years.
Admiral Laborde ordered the scuttling after receiving intelligence that German combat groups had entered Toulon at 4 a.m. on the 27th of November 1942. He transmitted orders to fire on unauthorized personnel and prepare demolition charges to ensure ships would not fall into foreign hands as required by the armistice terms.
French crews destroyed 77 vessels which included three battleships, seven cruisers, fifteen destroyers, thirteen torpedo boats, six sloops, twelve submarines, nine patrol boats, nineteen auxiliary ships, one school ship, twenty-eight tugs, and four cranes. Thirty-nine small ships were captured by Germans but most were sabotaged or disarmed before they could be used.
The Allies invaded French North Africa in Operation Torch on the 8th of November 1942. This invasion prompted Adolf Hitler to order Case Anton on the 19th of November 1942 which led to the occupation of Vichy France and the subsequent scuttling of the fleet.
Several submarines including Casabianca and Marsouin reached Algiers while Glorieux reached Oran and Iris reached Barcelona. The flagship Strasbourg also left her moorings at 5:40 a.m. on the 27th of November 1942 to escape to Algiers.