1. The APU uses the #2 TANK aft pump for its fuel supply. There is also a APU START PUMP (DC) that is used for APU operation if AC power is not available (for example starting the APU off the battery)
2. Yes, the #2 engine has a manual start system which consists of a teleflex cable from the start valve to a handle in the tailcone compartment. You still need a stand or platform to access the handle though.