Yes.
No, it is not necessary to give an engagement present unless someone is giving a party for the fiance and fiancee. A wedding shower gift from the females invited to the shower and a wedding gift is etiquette.
Gifts are not customary at an engagement party because they are expected at the wedding and etiquette dictates that those who are invited to an engagement party should be invited to the wedding. If you choose to give a gift you can but it is not required or expected.
No, even though you are giving the bachelor party you should still send a wedding gift. Since you are the host of bachelor party, you can give a small wedding gift though. A set of towels, an oven dish, or kitchen kit with hot pads and dish towels would be good.
Etiquette states that you have up to a year after the wedding to get someone a wedding gift.
I know you're doing a lot, but you do need to give a wedding gift.
You can give your fiance his wedding gift the day before the wedding or on your wedding night as it should be private when the two of you exchange gifts.
Yes, if there is a wedding in a church and a reception then you should give a gift even if it is a third marriage.
No, dates do not have to give a gift to the wedding couple. Your date does.
* No, you do not give a wedding gift when you are invited to a wedding, but please reply on the small card with stamped envelope to let the person who invited you that you will or will not be attending and tick where there is a guest you are inviting or your husband or boyfriend. If a woman then you give a gift at the bridal shower and of course a wedding gift which you would leave at the Wedding Reception.
There are quite a few websites where you can get information on what to give as a bridesmaid gift. I suggest you have a look at this site first - wedding.theknot.com Wedding Planning Bridal Party.
The father of the bride and groom can give the wedding gift to them the day of the wedding at home or, they can leave the gift on the gift table at the wedding reception. However, if it is of cash value it is better to give the bride and groom the money before the wedding.
If it is the host that is leaving and the party is for them then yes, you do give a gift. If they are hosting the party for a friend or family member then you would give the gift to the person leaving.