In the retrieved string i can't find my "NOTE" as i wrote in the page "My Wallet --> Transactions (recent)" near the yellow icon with a green plus (+) into. Where are them?
I don't think they have an API which includes the "notes". They aren't put into the actual blockchain, they're on BC.INFO's database instead.
Each transaction has inputs and outputs:
If a transaction has an input with your address on it, that means you are
SENDING coins
If a transaction has an output with your address on it, that means you are
RECEIVING coins
To get total amount:
for amounts sent in a transaction, look for inputs with your address on, total the values of those
for amounts received in a transaction, look for outputs with your address on, total the values of these