Short answers, pulled from the story.
The Tunisian campaign began on the 8th of November 1942 with Operation Torch and ended on the 13th of May 1945 when over 260,000 German and Italian troops surrendered. Last Axis resistance in Africa ceased after the fall of Tunis and Bizerte on the 7th of May 1943.
Colonel Alexander Stark's Stark Force defended the pass while General Rommel launched the attack on the 19th of February 1943. The battle involved units from the 1st Guards Brigade, 18th Regimental Combat Team, and the Centauro Division against the Afrika Korps.
Operation Ochsenkopf failed to gain control of Djebel Abiod and cost the Axis grievous losses in infantry and heavy Tiger Tanks. Fighting lasted until the 5th of March 1943 before Arnim called off the operation due to terrible weather conditions.
Over 260,000 German and Italian troops became prisoners of war following the surrender that ended last Axis resistance in Africa. Major-General Gustav von Vaerst surrendered his remaining 5th Panzer Army before noon on the 9th of May 1943.
The North African coast has few natural harbors forcing armies to rely on distant ports like Alexandria hundreds of miles from Tripoli. Control of the central Mediterranean was contested by equally matched British and Italian navies creating reciprocal constraints on supplies.