Doesn’t mean anything because not all religions do communion. Some Christian churches don’t do communion while Muslim and Jewish are not Christians so they naturally wouldn’t have the rite as part of a service. Communion originated in the New Testament.
No, it is not in communion with the Catholic Church.
I have never heard of a Marians Church. Do you mean Maronite? The Maronite Rite is in full union with Rome and a Catholic Church. Yes, you may receive communion.
No, a Catholic should not receive communion in anything but a Catholic Church.
Some do and some don't if the apostolic church is a literal communion they do if they are a spiritual communion apostolic church then they don't.
Yes, the Episcopal Church is part of the Anglican Communion.
It depends on the church. Some you can; others (like Missouri or Wisconsin Synod), you must be a member.
No
The Church of England allows Catholics, and I presume others, to receive communion out of a "spirit of Ecumenism." Whilst they allow this, a Catholic should not partake of communion with any "church" which is not in communion with Rome; as to do so, is an explicit consent to the believes and teachings of said "church." Please see the link below for a full explanation as to why it is wrong for Catholics to receive communion in a Church not in communion with Rome.
You do not have to be baptized to receive holy communion in the United Methodist Church. The only requirement is that you feel moved to take communion. This is called open communion.
in a church
Communion is usually held during a church service. Some churches have communion one day a month. Others have it only on special times. Ask your church when you will have one.
The Catholic Church is the 'communion of holy people.'