hello,
1 - i need account which site to create a bitcoind account? it's free?
You don't need any account.
I recommend you not using bitcoind or bitcoin-qt but an alternative, easier client such as multibit:
https://multibit.org/2 - i'm looking the usb erupter to start minning because its more simple to start, it's recommended?
Any investment in mining can be a waste of money.
USB eruptors will not make you earn anything; they are now good just for educational purposes.
3 - anybody recommends any article about how to start with bitcoin and minning?
This forum is full of informations and people willing to help.
Watch out: there are a lot of scammers too!