Needed for homebrew?

I can buy a Supercard mini SD here in bangkok for roughly $50, and I think I will. The guys in Bangkok are not experts at english, so you can't gather any information whatsoever from them. Is it homebrew friendly at all to run the SC? So I have to know some stuff from you guys.

1. In order to run homebrew I need to do more than buying an SC, right? Or, is it possible to do the flasme thing without any other devices? Without passme, which seems to be the device one needs, right?

2. I guess I can run backups of nds and gba games directly though after I buy the SC, right?

3. Is it possible to just run nds games now, and when I get back to my homecountry fix the homebrew part? I just mean that buying the SC and running nds games will not in any way destroy the possibility to run homebrew later?

please answer all the three, I need to know as fast as possible, thank you.

1) there is a way. its called wifime. you must have a wifi connectivity with a pc to do it. but i haven't done it so i dont know more. or you have to buy the passme
2) see the http://eng.supercard.cn/
CF TO GBA ROMMAN PRODUCTS
3)you can run games and homebrew programs when ever you like