Who was the first hostile militant and when was this decided?
Massachusetts was declared in a state of rebellion in February 1775 and the British garrison received orders to disarm the rebels and arrest their leaders.
How much money did Britain use on the war with the American's and what did they use it for?
Britain's war against the Americans, French, and Spanish cost about £100 million. The Treasury borrowed 40% of the money that it needed. Heavy spending brought France to the verge of bankruptcy and revolution, while the British had relatively little difficulty financing their war, keeping their suppliers and soldiers paid, and hiring tens of thousands of German soldiers.
What was the Treaty of Paris (1783)?
.... you should know this one.