Some need many, regular sprays with specific chemicals to yield a good crop free of insects and disease - these would include apples, quinces, cherries, apricots, plums.
Some are kind of in between -- spraying helps, but you can usually get something usable without spraying -- most pears, peaches fall into this category.
Some can yield wonderful crops without any spraying -- persimmons, paw paws, mulberries, figs, most nut trees all come to mind.
As far as keeping birds from eating the figs, you can bag the individual fruit instead of the whole tree. People use various types of bags -- some people use ziploc sandwhich bags, although personally I think they tend to collect too much moisture and promote rot. Sturdy paper bags work. The best are small muslin or nylon bags -- people buy disposable "footies" for this purpose, they're pretty cheap and very easy to use. You need to bag the fruit when its fairly small and then let it grow right in the bag.
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