Fire belly newts! 10 ez points.?

How many fire belly newts can fit in a 10 gallon tank for thier whole lives. what substrate can i use for them. should i make it aquatic and some resting areas. do i need a filter, if so wat kind. how much water do i put. would male and females fight. will they breed if there is a lot of them. tell me everything i need to know about them and how much everything will cost. thank u so much. 10 points to whoever has the best answer.