how much would 2- 6 watt solar panels be able to power
Relatively speaking, not much. Consider that a 60-watt light bulb uses roughly 5x what those panels could produce in full sun.
Look at the power usage info that is present on every electrical appliance, tool or gadget to see what normal wattages are.
There are lots of threads here about power usage, solar power and batteries. The search function is your friend.