The main difference between a spring roll and an egg roll is that a spring roll has a clear, non-fried wrapper while an egg roll has a fried opaque wrapper.
Yes! You don't need a kosher cookbook. Just remove the non-kosher ingredients.
According to Wikipedia, the uncooked egg roll is dipped in egg or an egg wash and then fried.
There is no non-kosher fruit.
No. Cows are kosher.
No.
That depends how religious you are. Orthodox Jews NEVER buy anything non-kosher. Yes, kosher wine can be stored in the same place as non-kosher wine as they're in sealed bottles.
Yes, there are non-kosher hotels in Israel.
It would be kosher if it came from a kosher animal.
Honey is kosher and some groups consider gelatin from non-kosher animals kosher because it is so far removed from its source.
An egg and cheese sandwich can be kosher if the the egg, cheese and any other ingredients are kosher and it was prepared in a kosher manner.
Eggs from any kosher bird (chicken, duck, etc) are kosher. However, you must check for blood spots in the eggs. If you find a blood spot, throw away the part of the egg that has blood, some people won't eat the whole egg. If the blood spot represents a chicken embryo growing in a fertilized egg or if there is a fertilized embryo in the egg, no part of the egg may be eaten. It is also worth noting that since ostriches are not kosher, ostrich eggs are not kosher either. The same applies to all non-kosher species of birds. Additionally, the rule that eggs of a kosher animal are kosher and eggs of a non-kosher animal are not kosher also applies to fish eggs.