Well, in flight the A330 has two engine driven generators, the APU of course and two batteries. The RAT often is called to be a part of the electrical system which is not quite correct. The RAT of the A330 is a part of the hydraulic system backup that mainly pressurizes the green hydraulic system for aileron, elevator and spoiler servo control. The green hydraulic circuit drives an emergency generator in case the two engine driven generators and the APU fail.
A full electrical loss is unlikely, but not impossible.
As for the analog instruments: the A330 has an analog airspeed indicator, analog attitude direction indicator, analog pressure altimeter and a mechanical radio distance magentic indicator. But even on a "conventional" flight deck you get loss of information i.e. red flags on the gauges in case of a power loss. If I take Concorde as an example, it loses any indication, even the variometer since it had been replaced by a digital one including the TCAS system. The only thing that continues to work, as usual, is the standby horizon, standby airspeed indicator standby altimeter and the magnetic compass. Anything else requires electrical power, no matter if you have a complex analog cockpit or glass cockpit.
Those few standby instruments do not help anyway if there are serious malfunctions combined with a crew that becomes rather stressed and confused, as incidences have demonstrated sadly. Loss of orientation during night / haze has already caused total losses with full power and full indications availabe.