Hi Ruben,
Since you are on the east coast, sooner or later, diseases and bugs will find you.
Of all you fruit, I am familair with peaches, cherry (also called stone fruit), apples, pears ( called pome fruit). Raspberries and blackberries are also called brambles.
I told you these because some people may use those terms so you know what they refer to.
To make it easier for you, figs, persimmons and blueberries do not need any spray.
You ask about Kocide, copper hydroxide, so I can tell you what I know about using copper. Copper is both fungicide and bacteriacide so they can prevent and/treat fungal and bacterial diseases.
Copper is usually used during dormant season as a preventative measure. Follow the label is best. However, a lot of times, a label is for commercial growers. Fear not, @scottfsmith and other experienced growers have helped convert measurements to amounts suitable for backyard growers like us. Check this out.
Spray amounts guide - #77 by Olpea.
At dormant, use 2 Tbsp of Kocide per a gallon of water.
You can add dormant oil per label to smother insect eggs, larvae, etc.
You can skip oil if you want.
Sticker/spreader like Bonide Turbo or Nufilm 17 can be add to keep chemicals on trees longer.
Copper can be used after trees break dormant to about a green tip stage but at a reduced rate to avoid leaf burning.
You can spray copper or copper mix to apples, pears, cherry, plums, peaches. If it list different rate for each fruit, go with a lower rate.
For your trees, I would skip spraying peaches to avoid causing damages.
Yes, you can use a hand pump sprayer. I used it for the first 5-6 years.
I would like to suggest you have a clean bucket dedicated to chemical mix only.
The way I do it.
Pour all water in the bucket first.
Put Kocide in and stir it thoroughly.
Put oil in and mix well (or skip oil)
Put sticker in mix well
Put in a couple of drop of dish soap and mix it in.
Pour the mix in a sprayer.
That’s it.
Hope this help.