Bread yeast is only a good choice for bread
You will need alcohol tolerant yeast for wine, there are a number of wine yeast strains available and I would recommend using one in your grape juice. Try Rockpile (RP-15).
Wine "wort" is called "must"
For the stout you want an ale yeast
Packaged dry yeast will keep for 3 years or more if kept below 40F (like in your fridge).
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger