I need to run a total of 300 feet from power pole to new breaker box,I will have 4 fans , 4 high output flourecent lamps,4 mercury vapor lamps, small window unit , fridge, and a hot tub. Will 100 amps do it? And what size of wire? Copper /aluminum?

We need many more details about the draw for each fixture. The hot tub alone may draw about 50 amps so a 100 amp service is not going to do it. What's the draw on the frig and the window AC and which units are 240 vac

If you are coming from a utility serviced pole, Have them run a drop and a meter base. The cost to go from a 100 AMP box to a 200AMP is minimal and you'll have plenty of space and load capacity. HD has a 200 AMP box on sale now with a main breaker and some other breakers already installed for $119