Re: I am going to use Block Control
Greg -
Since you have insulated your tracks into so many blocks, I assume you not going with DCC at the current time, right? For each section, you will need to connect feeder wires to each rail. These are short wires, fairly small (20-24 AWG) that pass through the layout surface to the bottom, where they are connected to bus wires. The bus wire is heavier, (14-18 AWG), and is used to connect the individual tracks (via the feeders) to the power supply, control switches, etc.
I would solder the feeders to the rails (that's a whole 'nother subject), but you could use other methods (wire nuts, suitcase connectors) for feeder-bus connections. This isn't near enough detail, recommend you pick up a book on the subject!
Finally, you mentioned connecting 2-3 turnouts to the same controller. That's fine as long as you want to throw all the turnouts at the same time, but keep in mind that each turnout solenoid draws a lot of current and your power supply might not be up to it.