Ok, I wanna register but not a simple way:

I live in hungary and we have HUFs (Hungarian Forints). If I ask Michal his address and I send him the 9 dollars in HUFs than he can go to a bank and change the HUFs to dollars? Because I just don't understand all of this paying thing. (PayPal, Digital Candle, etc...)

I think paypal just converts the currency to us dollars, so you put in 9 dollars and it takes however many HUFs from your credit card. Hey, it works for canadian dollars...

The problem is, that I and my parents don't have any credit card. Just plain checks and cash...

..How can you have checks, without having a credit card?

The same way you can have a brain without being a rocket scientist!
Duh, its call a bank account!