I am now an american citizen and would like to bring my wife and kids. Do I need an I-130 form for each of them or can it be just for my wife then include the kids. Also what are the required papers for this? How long does it usually take? Thanks in advance!

You should read the K-3 or IR-1 guides.

http://www.visajourney.com/forums/index.ph...mp;page=k3guide
http://www.visajourney.com/forums/index.ph...page=i130guide1