Children are allowed as long as they're on the guest list, thanks.
If your invitation says “and Guest,” then yes, if not, we would prefer if it was just you.
"Cocktail" or "Dressy Casual", please. We want you to feel comfortable, so if those shoes are too high or that top button is too tight, let it all hang loose.
No, you are more than welcome to attend the wedding without attending the reception. However, if you are planning on attending the reception, please RSVP.