The same things that the Preisident does today. Lead the army, be chief of state, be head ambassador, ect.
Before his presidency Washington helped form a new country, as president he helped establish the role of the presidency, and after his presidency he became the new country's largest distiller of whiskey.
Alexander Hamilton was probably Washington's most important adviser on the economy.
He was a Commander( i think )
It inspired the French Revolution, which eventually led to Napoleon's rise to power.
He set examples for other presidents to follow
The Department of the Interior was not created during George Washington's presidency. It was established later, in 1849, to manage the nation's natural resources, cultural heritage, and public lands. Washington's presidency saw the creation of other key departments, such as State, Treasury, and War, which laid the foundation for the executive branch.
Because Washington send General Anthony Wayne to put down the Native American resistance by force.
The national debt due to the revolutionary war
Without a precedent to follow, it was a matter of trial by fire or Fly by Wire.
He was a surveyor
Alexander Hamilton was the Treasury Secretary in Washington's cabinet and did a lot of fiscal management. Of course, Congress actually controls the money and I do not know who controlled the fiscal committees in Congress.
He did not take advantage of the opportunity to keep the power the country offered him.