100 amp service 450 feet from pole.

10 4 foot floresant light fixtures 80 watts ea.
4 3 speed fans watts? Guess 500?
Kitchen area:
1 window AC unit guess 2400 watts
1 microwave unit guess 2000 watts
1 12 cup coffee maker 1200 watts
1 Rifrigerator 600 watts
Bath Room:
1 light/fan 400 watts

Rounding up guestimate 10,000 watts or 84 amp.

What size wire would you suggest for 120 voilts single phase service??

Copper or aluminum conductors? Are you sleeving it in pipe, direct burying it, ariel? And that's a pretty far run explain your situation to us.

120V? I think you mean 120/240V.

Don't tell me that for one second you were considering just 120V for such a job.

I am sure the poster does not realize a standard residential service is 120/240 volts, or simply two 120 volt legs.

The installation, based on the listed loads, sounds like a hunting cabin, or similar.

I would suggest using #4/0 aluminum wire, using a 4 wire direct burial cable called URD. This can be buried directly in ground, using 6 inches of sand below and above. Being such a long distance, for additional protection, I would suggest using 4 inch Sch40 PVC conduit as a sleeve.

You will need to splice #2 wire onto the #4/0 to reduce the wire size at the panelboard, as the lugs will not accept the #4/0 wire.