No, but the dish will taste better if red wine is used. If you don't want to consume alcohol, you should know that cooking drives off either all or most of the alcohol found in the wine. Even many non-drinking alcoholics consume dishes that contain red wine (or other Alcoholic Beverages) as an ingredient.
It will change the taste.
i would say no, because red wine could be dry or sweet and sherry would not have the body to create a sauce if this is what it is intended for.
Brown bottles help prevent oxidation of red wine by exposure to light. If the wine is protected from light by another means (e.g. storage in a barrel), the brown bottle itself is not necessary.
You can but it is stronger in flavour so don't use as much.
The british call it "Claret"
A wine filter is not necessary for any wine once it is bottled and packaged. It is safe to be consumed if it is sold to a person in stores and can be consumed without any extra filtering.
Not in the same measure. Recipes calling for a cup of burgundy are not uncommon, whereas most recipes using Marsala will call for two to three ounces at most. Marsala has a much more distinctive taste than burgundy, and hence should be used more judiciously
There is a wealth of resources available online for cocktail recipes and a good website that is a favourite would be All Recipes. A cocktail recipe book at your local bookstore would also be a good alternative.
I would not recomment it. Sherry is a fortified red wine. You can use vinegar or lemon juice in most recipes calling for white wine.
It's not necessary to let wine "breathe" before drinking it. Research suggests that it provides no benefit.
Sangria There are many different recipes for making Sangria. Experiment to find one you like.
You can get sick by drinking red wine, especially if you are dehydrated. You can get sick by eating fish in several ways - * allergies * scombroid (histamine) toxins from exposure to air above 16C after catch * food poisoning (from bacteria) The combination of red wine and fish will not cause any problems of itself. Several good fish recipes involve cooking in red wine. Some of the more flavorful fish are often served with red wine.