It takes about 3 people in the kitchen and 6-8 out front to set up, serve, and clean up this size party, and none should be part of the wedding party-

How many chocolate I need for the chocolate fondue fountain? Read the chocolate fountain article. Full help on amounts, etc. Consider doing a chocolate fondue instead of a fountain, less spatter, better chocolate, and you don't have to have someone standing there continuously to make sure nothing goes wrong- you really do have to do that with a fountain. You could have a punch fountain instead...

Different kinds of soda?
Water bottle?
Champagne bottle?
Napkins?
Forks?
Knives?
Spoons?
Glasses?
All covered on the beverage planning page.

These items could be put out early as an appetizer area, switching to fruit trays instead of fruit salad
Vegetable tray
Fruit salad (fruit tray)
Pickles
Cheese tray with crackers

Meat?
Pork?
These depend on the recipes used and the cut of meat, so tell me what you are actually planning.

Potato salad? about 40 pounds of potatoes
Pasta salad? about 6 pounds dry pasta

Shrimp ( shrimp to cook with the rice and beans)?
Bags of rice?
Bags of beans?
You have to tell me what the recipe is for this and whether they are all being cooked together.

Bags of green beans? 28 pounds
Corns? same

Iceberg lettuce?
Romaine lettuce?
Salad for 100 on the plan for 100 page, with the potato and pasta salad that will be plenty.

Beets? Depends on whether they are served as one of the vegetables or part of the salad. Need more info.