if you going completely analog you probably will be using toggle or rocker switches. something like
these. this particular auction is from China and will take about 2 weeks to get to you so if you want them faster look for US seller (bit more expensive though). old cellphone charger or any other wall-brick can be your power source. that's for static lighting.
as for signals, they can be as simple as red/green indicator depending on given turnout position. you will need however to have all your turnouts equipped with position detecting switches. i used limit micro-switches for this.
in more elaborate setups you would use block detection hardware in conjunction with signaling boards (
team digital website). and the ultimate solution - PC driving all your lighting via specific hardware (my personal goal). well as they say, signaling is a hobby within hobby. something to strive for .
hope that answers some questions, but it sparks quite more, doesn't it ?
PS.
here is my signaling/switching contraption i just took out of commission. video of it in action in my sig.
going all digital now, future solution will be loads better