The pins you care about are Vcc vs. GND (pin 7 vs. 8/22). You should see ~5v.
For the oscillator, put your multimeter on OSC2 and you should see a fluctuating voltage at around 1/3 - 1/2 of Vcc. You can also probe OSC1 - sometimes that helps getting the crystal going.
You can also build a RF probe: a capacitor + a diode (1n4148 or even a small led) + (resistor // capacitor) to ground. Put the cap's one end to OSC2, and you should get a small voltage (100mv - 500mv) on the resistor // capacitor.
Also, don't forget to check your wiring.