billions
infinity
Theres only one - our sun.
I think you need to better define what you mean by "configuration". If you mean a pattern of stars with which you can play connect-the-dots to form a picture in the sky, that configuration is called a constellation. If by configuration you mean a close grouping of stars, it would be called a cluster if the total number of stars was in the hundreds of thousands to millions, or even a galaxy of the total number of stars was in the hundres of millions to billions.
62
Total number of stars is uncountable. Sir James Jeans is of the view that as grains of sand are innumberable as are the stars.
Although there are 150 stars in total, you only need 80 stars (and Mario) to complete the game as this is the number of stars you need to get into the final Bowser level.
Nobody Knows in total.
No, but "Number the Stars" is a novel.
50 stars in total.
50 stars in total.
About 66 in total, though the number of star systems is less, since there can be two or more stars in any system.