how do i say 'i have' Türkçe'de ?

İ have a car
İ have course,,ect

İ know we use olmak as v.to be ,right ?
And we express v.to do with yapmak,right ?
so what do we use as v. to have ?

You use a personal possessive pronoun with "var"

bir arabam var - I have a car - literally my car exists.
köpeğim var ama kedim yok - I have dogs but no cats.

There are verbs:
malık olmak - to possess
sahip olmak - to acquire

But I think "to have" is usually expressed with "var" and "yok"

ok,tşk bod

btw,in English we can have short answers with (do)

As, do you like Cola ?

we can have 3 answers here,
Yes
yes,i do
Yes,i like cola

Türkçede,

Colayı seviyor musun ?
Evet
Evet,Colayı seviyorum

There is no (i do) form here ?

Btw,is it Colayı here or Cola'yı ?

The c is never used as k in Turkish. It is kola.

In the 60's or 70's when "coca cola" came to Turkia we started calling it "kola". We didn't know it was a brand name and we didn't know the drink should be called coke. In fact nobody cares about these things. We simply call it kola no matter it's brand name. Even when it is pepsi you can say kola.

-Kola sever misin?
-Evet çok severim. Her gün iki litre kola içiyorum.

even on the coca cola's bottles, it is not written Coca Cola?

İt writes Kola ?