What can I sterilize in boiling water and how often do I need to do it?

You should definitely sterilize anything thats going to go into the babys mouth! Exactly like you said, in boiling water, for 2-5 minutes. You can do the toys too, but don't boil them. If they are plastic put a couple inches of water in your bathtub & a VERY SMALL amount of cleaning product and let them soak. Then rinse them & as long as you can't smell bleach or whatever you used on them you will be fine. I suggest you DONT wash the babies clothes before he/she is born. Only because you don't know how big your baby will be & it would be a shame if you have a 9lb baby and he/she not be able to fit into newborn clothes & then you wouldnt be able to exchange them. Definitely wash all of the bibs, burp rags, receiving blankets & regular blankets before your little ones arrival though. & the cloth diaper question, i'm not to sure about, i used regular diapers with my kids. good luck!