Sold my toy and looking at getting sensible family car.

I am sure question has been asked loads so am happy if someone can point me in right direction if dont want to answer. I am bored of looking at poorly written car adds that dont tell you any info and i find out more just looking at the pics.
1/ is there an easy way to know if car has sport pack rather than just 20" wheels and sport exhaust?
is there a information point to check what spec the car was ordered with?
2/ was interested in a car but it has round steering wheel rather than flat bottom, why would someone replace it?
thanks in advance and looking forward to being more active on here once i get one
Chris