You should drink it all after opening it. If this is impossible; there is an inexpensive product with which you can apply a vacuum seal using a rubber stopper and a small hand pump. Personally; I never open a quality wine bottle unless I plan to drink it all(preferably with a friend). If you are inclined to drink only a glass or two per day; a boxed wine might be advisable.
Cheap wines are made and sold to be drunk immediately. They will not improve with age. You could keep a bottle of cheap red or white in a drinkable condition for about three years, but it won't be as good as the day you bought it.
As long as it is kept cold, indefinitely.
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howlong you want just store it in the fridge!
2 years
A long time, 5 years at least unopened or opened provided you keep it cool and out of the sun.
If you open the bottle, you need to keep it refrigerated and it will last for a month. If it is an unopened bottle it should last for about a year :)
It should last indefinitely if kept in a cool, dark place.
.Who is with you?
I'd start getting nervous after three years, depending on the brand.
I have a bottle of Cointreau that was first opened 16 years ago and it still tastes fine!
Chardonnay is good for about 7 years unopened.