Hey there i need some advize what do i need to buy

i have 4 Cars
2 Blue
and 2 Gray one Titanium gray ( Metalics )

I know i need claybar ( how many for one car ? never did it before )
I Need some polishing compound ?
Sealant ? and Wax ?
and this orbital tool.. buffer ?

what pads do i need ?

what brands can someone tell me good setup ...

Thank u i Advance and sorry for my bad Engish