Do you need to buy the race tickets to be able to watch nascar qualifying?

I really want to know since nascar is gonna be in watkins glen this weekend because I want to see the drivers somehow but I dont have tickets, are people allowd to just go and watch qualifying and practice?

Which NASCAR Driver was able to win the championship the soonest upon entering the series?

In other words, who was able to win a championship whether it Winston, Nextel Cup, etc. Earliest in their career? For example, Tony Stewart won the Winston Cup in his fourth year in Nascar, did anyone win it sooner ?