This is the wrong section to post this question in, it should be in the Newcomers Corner, but I'll answer anyways. What you need to learn are arrays and UDT's (User-Defined Types). They will allow you to have multiple "slots" and variables for an entity. You should be able to search the forums for tutorials and plenty of information on them, but here's a short example of them:
type enemy
name as string
health as float
number as integer
endtype
dim enemy(10) as enemy
enemy( 1 ).name = "Goblin"
enemy( 1 ).health = 100
enemy( 1 ).kind = 1
enemy( 2 ).name = "Witch"
enemy( 2 ).health = 500
enemy( 2 ).kind = 2
enemy( 3 ).name = "Rat"
enemy( 3 ).health = 20
enemy( 3 ).kind = 3
That will set up and define variables regarding 3 enemies. If you want you can add me on MSN as gamedev06 at hotmail dot com or on AIM as gamedev06 at aol dot com and I'll help you out and explain more.