Short answers, pulled from the story.
The Mozart family grand tour officially began on the 9th of July 1763 when they departed Salzburg. The journey concluded with their arrival back in Salzburg on the 29th of November 1766.
Wolfgang Mozart performed before Elector Maximilian III Joseph in Munich and played at Count Collalto's palace within three days of arriving in Vienna. He also appeared at the Imperial Court where Empress Maria Theresa tested his abilities by covering the keyboard.
After departing Salzburg, the Mozart family traveled through Munich, Augsburg, Schwetzingen, Mainz, Frankfurt, Koblenz, Bonn, Cologne, Brussels, Paris, London, The Hague, and Switzerland. They returned home via stops in southern Germany and the Austrian Netherlands before reaching France.
Leopold Mozart reported expenses of 1,068 florins covered by earnings in November 1763 without surplus. Later records show he deposited 2,200 florins with bankers in April 1764 but spent 1,870 florins since July 1764 due to high living costs in London.
Wolfgang Mozart composed Symphony No. 22 in B flat major K. 22 in The Hague and wrote Gallimathias musicum specifically for a concert honoring Prince William V's coming of age on the 11th of March 1766. In London he created his first symphonies including Symphony No. 1 in E flat major K. 16 and vocal works such as God is our Refuge K. 20.