You need to take it to a trained professional
Almost any air rifle scope will fit a Daisy. Check Walmart or a sporting goods store for a Daisy scope. But any air rifle scope should fit the dovetail mount that is on the rifle.
This rifle was made by Daisy air gun. (see the link below)
Only if the rifle is designed for pellets. If it is a "Red Ryder" then the answer is NO. Daisy makes PELLET rifles.
If you are talking about the Daisy Air Force Rocket Command Rifle, it was made in 1959 only If this Rifle is in excellent condition it is worth about $300
There are air rifles and there are air guns. These are guns that use air or C02 to fire a BB or Pellet, not gunpowder. A DAISY RED RYDER BB Rifle would be considered an "air rifle." There are several companies that make air guns and air rifles. Gamo, Daisy, Crosman, and Umarex are a few of these companies.
Daisy offers a free service to tell you more about your Daisy. You can also write to them and see if they have a parts drawing for the rifle (See the links below)
Daisy offers a service to evaluate and date old Daisy Air rifles. See the link below.
Daisy made a model Golden Eagle BB rifle but it was a model 104 golden Eagle from 1966-1974. Daisy made a model 88 Hunter rifle, roughly from 1957 - 1960 Daisy made a model 98 Daisy Eagle in three variations from 1955 -1960. (I think this is the rifle you are referring to.)
What condition is it in? That determines the value.
I suggest you contact Daisy for the answer. They offer a free service to answer question about your old Daisy See the link below
There are no rebuild kits for the model 220. However there are places that repair and restore air guns (NOT Air Soft guns) look up air gun repair on the web and locate one near you. Also the Daisy model 220 (1965-1970) was made by Milbro of Scotland
There are several versions of the Daisy 1894. Daisy offers a free service to determine the value of Daisy Air rifles and guns. See the link below.