when we run the daemon, is it automaticly generate wallet.dat ?, why we need to run again simple wallet ?
Hardmanic,
You need to run two processes running at the same time.
brazukcoind --> it syncs the blockchain
simplewallet --> it interacts with the other process 'brazukcoind'. Here is where you create your wallet, start mining coins, tranfer funds, etc.
ps.: Don't forget you paswords! Keep your seed info written on paper.
Good luck!