Excise bill info needed for import item

We have imported material. We are registered with aces as dealers. We have import no. also. In the bill of entry there are some categories/ components that I am listing below.
Price                                            : 1000/- (suppose)
BCD @ 10% (custom duty rate)     :   100/- 
CVD @ 12% (Excise Duty Rate)     :   132/-
Cust Edu Cess @ 2%                    :       4/64
Cust Sec & Hr Edu Cess @ 1%      :       2/32
Addl Duty - (Imports) @ 4%            :      49/56 
                                                        1288/52 (figures are for example only)

We purchased four items and all are charged at the same rate for all the items. 

My Query:

1. Do I also need to pass CVD item wise?
2. Do I need to pass Basic Customs Duty too or Do I need to adjust it in the cost?
3. Do I get some part of BCD or addl duty as refund or is it my cost totally?
4. Is there any incentive on importing from the government which we can claim?
5. Do I need to make a separate bill for all the four items or can I make a single bill with or without showing each component for each item sepaarately?

Thanks Mr Anandan for clarifying my doubts to great extent but can additional duty benefit as you said be passed or as my client said that since this is equivalent to VAT so it can't be passed. In that case, can we take the benefit against local sales VAT?