Worked very hard on trying to understand giucco piano. So many questions Please!

Im trying to build my rep against 1.e4 and im up to fighting the italian game and im noticing its really not a forced sequence of moves more or less its just a universal set up that both sides reach by like move 10. Its not sharp at all but usually it goes to the more or less same positions for example, i annotated this game

Anyone please?

Yes, Black would still play ...Be6 had Nc4 not been played.  Black would welcome the exchange of light squared bishops if white took.  That's because after ...fxe6 Black has a strong pawn center.

Lets answer your questions:

Question 1: In order to understand why black plays Ba7 you have to understand the ideal white plan. The ideal white plan is to play d4 (now that white has castled Bb4 is not a dangerous anymore opposed to an early d4 where black equalizes because of Bb4+). So somewhere in the future white will play d4 and by "forking" the e5 pawn and Bishop on c5 black is forced to take on e5 and give up the center. So by play Ba7 black improves the position of his bishop because the d4 became less dangerous. Important to point out is that black hardly lost time on development because white also lost time by playing Bc4 to b3. 

Question 2: Because in that case Bg5 can be attacked by h6 and white has little better then return the bishop to e3 (giving black the h6 tempo for free). Retreating to h4 would be dangerous because of g5 and because black did not castle he gets a free attack on the white king. 

Question 3: If white would play slower plan with Nf1 (in my opinion stronger than Nc4) black would still play for the exchange of the white squared bishop but he should prepare it a little better with moves like 0-0 and Qe7 before playing Be6

Question 4: White generally tries to attack on the king side with moves like Re1/Nf1/Ng3 (this is the reason why the N is better placed on f1 than c4 and conduct a spanish style attack). Black will play to open the center thus negating the white attack. 

Question 5: If white does not want to exchange the bishop he will have to make consessions (either keep his bishop on c1 where is does nothing but stand in the way of the rooks or move it to d2 where it does nothing either). Blacks bishop however even though it is the bad bishop has a very nice position working against the d4 play and putting pressure on f2 and even g1. So there is no reason for white to avoid the trade. Good bishop/bad bishop is a generalization you have to look at the actual position of the pieces and decide who will be favored by the exchange. Blacks bad but strongly places bishop or whites good bishop that has no squares. The timing of the exchange ofcourse is perfect. Currently black would not take because after taking on e3 white would take back with his f pawn opening the f-file where the white rook is already in attack position. However white wants to play Re1. After Re1 black will take e3 because without the rook on the f-file fxe3 is no risk anymore. By taking himself white forces the slight displacement of the black rook. 

Question 6: Yes black improves the position of his rook (it wants to communicate with his friend on f8 and support d5 sometime)

Question 7: This was the plan after Nc4 all along. It never was well places there but it is looking for the field f5 (standard spanish attack patterns). 

Question 8: This would require more analysis from me because we are in an actual middle game now where plans are executed. For me personally Qd7 looks slightly more logical. It discourages Nf5 a bit and it connects the rooks. 

Further questions are about game analysis. Something i have no time for now. 

Estra is once again faster than i am. Hope my answers give some extra inside 

Estragon and Moonnie thank you so much for your insight it really answered all my questions and i really appreciate it!

haha never try to understand the giuoco piano.

after 4. b4, black can resign.

i play the hungarian defence.

@pdve: Some people do not like a passive defence like the hungarian defence specialy not where there are much moves like Bc5 or Nf6 that equalize much easier. 

The Evans gambit is a respectable gambit and one black should known. However when black knows what to do the remaining position is equal. 

ok i guess i never looked it up. anyway, it's pointless because i play c5 to e4. and i know the smith morra decently ok.