Crested are great starter geckos.

Very easy to care for, 68-78 degrees is really ideal, if the temps are comfortable for you they will be for your gecko, they do not need for supplemental heat or light. Temps in the 80's will stress them and can lead to death.

They can eat bugs however it is not a requirement, they do fine with only CGD (aka crested gecko diet, a powder that you mix with water), this means if you do not want to deal with bugs you do not have to. However if you do want to offer bugs crickets and dubias are a great choice (I prefer dubias since they have a better meat/shell ratio, are resilient and do not stink like crickets do)

They do well in tanks as well as in tubs, a small critter keeper for an hatchling will work fine as a temporary solution until they are big enough to be housed in their permanent home.

2 females can be housed together if they are the same size however when young they may compete for food, which means one can get bullied and not grow as fast as the other.

Males should not be housed together.

You can have a male and female together however I recommend to separate them to give the female a break.

Here are some good sources http://www.acreptiles.com/main/index...=53&Itemid=316 , http://www.pangeareptile.com/store/c...-sheet-en.html (Not sure about books)