How much money would I take home after taxes and everything yearly if a McDonald's store made 2.5 million dollars a year?

One store won't make anywhere near that. You might be looking at gross sales not profit. So deduct the cost of everything including corporate taxes to get the net profit. Then the owner will probably have drawn a salary like everyone else so if any dividends on investments not much the rest of the profits go back to build the business.

A franchise owner would be doing well to get 100K in salaries and dividends so that is why they try to own more than one.

2,500,000 profit? And you were a sole proprietor? Maybe 1.5 million or so. Total sales of 2.5 million? A lot less, since a lot would go to exspenses.

the amount the store made would make no difference in your wages

you would be paid the number of hours you worked times the rate of pay you were awarded

Why is one related to the other at all? Would you be the owner of the franchise or a part-time clerk?

No way to say. Do you own it or are you cleaning the parking lot? If you own it, how is the entity that owns the business set up?

No more money, but surely you would want fries with that.