Yes, good question!
"Including" is either a preposition or a verb. As a preposition, "including" means "such as." Example: "the store has many different fruits, including pears, apples, and grapes." As a verb, "including" is the active present form of "to include." Example: "I am including my mom in my wedding ceremony."
"Inclusive" is an adjective that means "containing a variety of items" or "not excluding things." Examples: "The US is moving away from discrimination to create a more inclusive society." or "The price of the vacation was inclusive of food, drinks, accommodations, and activities."