does the CX come with leather seats and shift lever on steering column
No, leather was an option available on the CXL, and 6-passenger seating was available only on the higher trim levels as well.
i am afraid both are optional features and u need to shell extra bucks to get them. http://www.buick-lacrosse.com/2010high-resolution-pics/
The 2010 and 2011 CX's only have 5 seat buckets and cloth but pre 2010 has a bench as an option