Hello I will help you with your question,
The 2004 4 Runner is 6 feet 1 inch wide (73 inches) and your opening is 8 feet or 96 inches wide so there is room to park it. A comfortable opening for a garage door is 9 feet but as long as you are careful (especially backing out so you don't catch a mirror) you will be fine. Many openings are 8 feet.
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Does 73" include the width of the side mirrors? If not, how much is it with side mirrors?
Yes, that is the total width including the mirrors.
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