The answer appears to be "yes" in both cases:
Tariffs in United States history:
In the colonial era, before 1775, nearly every colony levied its own
tariffs, usually with lower rates for British products. There were
taxes on ships (on a tonnage basis), import taxes on slaves, export
taxes on tobacco, and import taxes on alcoholic beverages. The
London government insisted on a policy of mercantilism whereby only
British ships could trade in the colonies. In defiance, some American
merchants engaged in smuggling.
During the Revolution, the British blockade from 1775 to 1783 largely
ended foreign trade. In the 1783–89 period, each state set up its own
trade rules, often imposing tariffs or restrictions on neighboring
states. The new Constitution, which went into effect in 1789, banned
interstate tariffs or trade restrictions, as well as state taxes on
The prevailing doctrine of Mercantilism advocated free internal trade and high external tariffs, so the Commerce Clause was an important indicator that the US was a single country.