There are several "first stops" in the US for immigrants. Ellis Island was one of the most famous, and is now a museum. Immigrants also came through the Port of Charleston, LA and San Fransisco, California - Seattle, Washington - Portland, Oregon - Miami, Florida - El Paso, Texas.
Asian and Mexican
yes
Missionaries
religious work
By the end of the 1880's most of the immigrants to the United States were coming from Europe. An equal number were also coming from Asia to work on the railroads in the West. Europeans came here to either work in the factories or farm the land.
Asian immigrants mostly
Canada
gems and porcelains
The history that most Europeans have of early Asian exploration is extremely limited. There is strong evidence that they did as much (and possibly more) exploration as Europeans have done over the same period of time. The sea routes though for Europeans would be different then we would expect most Asian groups to have done.
Japan and China
Asian and Mexican
Most of them got to the Americas from the land bridge known as Beiring Bridge. Asians were the oldest immigrants and are called as Native Indians. The European immigrants only started coming to Americas after the discovery of America by Columbus
Millions of Europeans have immigrated over history. Most likely hundreds of millions.
yes
Angel Island Immigration Station
west
For the same thing as most immigrants. To have a better life than they could ever have in their native countries. Here we have more freedoms and many more opportunities.