I see r4ds and a micro sd but what else need to buy to start playing backups and homebrew?
Any help is appreciated. Thanks also any advice would be appreciated

I found this

http://www.nxpgame.com/r4ds-kingston-2gb-microsd.html
is this all I would need?

Idk if you've sprung for it yet or not, but I'd suggest against it. The R4 use to be a good card, but it's outdated. There are better cards out there for less money.

Here's a comparison chart by my good friends from Nintendo-Scene

If you have your heart set on getting the R4, well then.. to answer your initial question, yes that's all you'd need. You can get it cheaper at realhotstuff