1) You bias the base with a pair of resistors between power supply and ground. This causes the transistor to conduct even with no signal. For a class A amplifier, you will adjust the bias such that the collector voltage (given the current flowing through the collector resistor (load) is about 1/2 of the power supply.
This allows the collector voltage to swing from Vcc to Gnd.
You capacitively couple the signal into the base.
2) I have never tried to drive a low value load like 32 Ohms. If the power supply was 12V and it was all dropped across the speaker, the current flow would be 375 mA and that seems like a lot. I'd have to think about that...
Watch the videos by W2AEW - he does a magnificent job explaining how these things work. For simplicity, not energy efficiency, you want to look at Class A operation. You can Google for circuits as well.