Is section six actual seats?

Yes, you should probably look at a map of the venue before purchasing your ticket... Google is your friend

any section ticket is actual seats unless you have lawn tickets they have no chairs. all actual chairs(seats) however are not under the roof of the pavillion

Yes

Dawn, some of the double lettered seats are not under the pavilion. Check your seats using their viewpoint seating chart. Or, call the box office

are all lawn seats first come first serve?

Yes. Nice seats too!

All listings as seats are seats,the lawn section will specify.

Anything they have listed as seating, looked to be. They also rented lawn chairs for the lawn area, so you don't have to worry about not having a place to sit.