Why I am seeing a spike of 9V on output and capacitor in 555 timer
What you're seeing is an artifact of the way the simulator operates. It starts by assuming that any capacitor is charged up to its' "natural" level. In this case, the combination of R1 and R2 cause the simulator to set the capacitor voltage to 9 volts, since that is the DC level you expect with the 555 not doing anything. And, when setting the start levels, the 555 inputs don't draw any particular current and the discharge transistor is not turned on. So the cap gets set to 9 volts.