Stop in for a cup of coffee

my brother bought my neighbor's dad's car after it sat for over 6 years.... we figured we would have to drop the tank and drain the fuel system....

He put a battery in it, it fired up and he drove it away... Never changed the tank....

Try it first...
Put on a new fuel filter. After driving it a week or so pull the filter and pour the gas out into a bowl or cup. If it's clear, good to go. If it's orange with sediment, you have fuel system rust issues.