Your relay should be fine. Allowing for the diode (0.5v) and assuming your 12v might even rise to 14v the most you will be asking of the 555 will be ~43mA DC ( (14v-0.5v)/324R ).

Yes (as tman said), you should orientate the IC so that the indent is uppermost and Pin 1 will be top LHS. Sometimes you just have a notch instead of the circular indent and again, with that uppermost, Pin 1 will be top LHS.

It's kindof obvious when you know and less so when you only have one IC to play with