Greetings,
After conferring with the Author and Ben Rome, Assistant Line Developer, the answers are:
1. Yes, the RATs for each faction in the book. Or, alternately, the ones in TW or any other product that meets the era requirements.
2. Rules for find the WP/SP cost of a unit are in Chaos Campaigns, yes.
3. Yes, to his question about aircraft. Or, whatever the rules of CC say.
4. Not strictly according to the rules in 3052. It was deemed too complicated. Alternate rules *might* be found in Chaos Campaigns.
Best,
Joel BC