Oil won't run out, it'll just get more expensive to extract, that's why the preduictions keep getting put back despite increacing demand. At the peak when it hit $160/barrel the oil companies were still only investing in infrastructure that would be profitable at $75/barrel. What'll happen is it'll slowly become expensive to run cars etc untill people switch to alternatives (public transport or electric cars for example) and the cost of plastics and fertilizer will rise.
Another example would be the synthesis of hydrocarbons from Coal, there's thousands of years of coal left. And it's not that expensive compared to some of the more inacessible oil reserves.
How many years of oil are left ?
Hard to say, see above
When it runs out the world economy will collapse
no, unlesss your Shell of BP
Industry of all types will cease
why, we can make energy from more than just oil
War/fighting civil unrest/ starvation...
Over the remaining oil maybe, but worldwide, no.
Its not looking great is it ?
In your disaster ridden distoppia, no, but in reality I can't see many problems.
there is no plan B because there is no Plan A, shit happens
Any country in the world have back up plans of any type...?
Norway is 100% powered by renewables IIRC, a mix of that and nukes should keep us in the manner to which we have become acustomed for the forseable future.