If you don't want to invite your parents to a wedding don't tell them about the wedding in the first place.
It's not in most cases. Destination weddings may be an exception, but to invite someone to your shower and not your wedding is a big no no.
yes That depends. What is the relationship between you and your parents like? How about you and your fiancee? Are you intending to elope? Are you inviting anyone else? There is no right answer as it depends on your particular circumstances. While it would be normal (common?) to invite one's parents, it is by no means required.
No, it's rude to invite a guest to the Engagement Party when you have no intention of asking them to the wedding. If the guest has a reason they can't make the wedding then it's just fine to invite them to the Engagement Party.
No. You can invite or refuse to invite anyone you wish.
* It is wise not to invite 'some' subordinates' lest you hurt others feelings. If you have close friends that are your subordinates then you can invite them to the wedding.
You are cordially invited to attend my wedding.
With difficulty.
There is no requirement to invite any single person to a wedding except the bride, the groom and the officiating authority. However, there are strong social expectations that certain people will be invited (parents of the wedding couple, etc.). Whether or not the godparents would expect to be invited depends mostly on how involved the godparents were in the person's life. If the godparents were like second parents (spent a lot of time with the child, babysat, took them to events, was present at major events like graduations, etc.) then it would be quite insulting to not invite them. However, if the godparents were present for the ceremony but otherwise not involved in the child's life, then it is socially acceptable in most circles to not invite the godparents. There may be some negative reaction from others involved in planning the wedding - parents, most likely, who expect their child to honor the absentee godparents.
I want to invite you out for a drink. Were you invited to the wedding?
jacob
It is not poor etiquette to invite the same relatives and friends you had at your first wedding. Many people are married a second time.
Often the wedding planner is not invited to the rehearsal dinner, but if the couple want to invite the wedding planner they should also invite his or her's spouse.