Hi there,
The first number "0077" is the actor ID or actor number and it defines that the actor is a tree. You have to write it into the Number field of the Actor section.
The variable defines how the tree behaves; as implied by the two &, you can sum two values, for instance, you could sum 0800 (get Deku seeds) and 000A (ugly tree) to get 080A (ugly tree that gives Deku seeds). Then you simply write 080A into the Variable field of the Actor section.
Now that you have set your actor, you have to load its object (model) into the map. On your list, the object number "007C" is next to the actor number. You have to add it in the object section. Note that you only need to add the object number once, even if you have multiple instances of this actor in your map (e.g. even if you had 100 trees, one object 007C would be sufficient).