I know how to say "I want" using たい after a verb, but how a say just "I want, I don't want" without a verb? Using just たい Or たいくない? And in the past?
You can say it using the word ほしい. For example:
新{あたら}しい車{くるま}がほしい。
I want a new car.
ほしい conjugates the same way as a normal i-adjective:
ほしかった
ほしくない
ほしくなかった
BTW, I don't know if it was just a typo but it should be たくない not たいくない for the negative form.
〜が欲しい - I want ...
〜が欲しくない - I don't want ...
〜が欲しかった - I wanted ...
〜が欲しくなかった - I didn't want ...
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2It would be helpful if you could provide an explanation and some examples. – Em. Jun 18 '17 at 17:28