"Tja, ich habe" means "Well, I have".
It could be the beginning of a sentence, for instance: "Oh, I`ve forgotten to do my homework!" "Tja, ich habe meine Hausaufgaben gemacht!" (= "Well, I have done my homework!")
Or it`s some kind of a short phrase. Such as "I haven`t got enough money to buy that dressy top." "Tja, ich habe!" (="Well, I have!).
The "am" can mean several different things depending on what follows (it can mean at, on, in, by, most, etc.). "Ich habe" means "I have."
ich habe = I have nor is not a German word
It means: I've done that Ich- i habe- have das- that macht- fone
ich habe kein Geld = I have no money
Correctly conjugated it should be "ich habe." This means "I have".
In my schoolbag I have...
Habe ich hunger? translates as Am I hungry?
Ich habe Geburtstag translates as It's my birthday.
Ich bin hungrig or Ich habe Hunger.
Ich habe dich vermisst or Ich vermisse dich. (I`m missing you).
I haven't forgotten you.
Ich habe eine frage an Dich = I have a question for you