It's a fast car. It's a fun car. It's a new car.

It's an old car. It's a red car. It's an ugly car.

I want to buy a blue car.
I want to buy a new car.
I want to buy a European car.
I want to buy a beautiful car.

Adjectives:
http://www.english-zone.com/grammar/pos-adj.html

List of Adjectives:

http://www.paulnoll.com/Books/Clear-English/English-adjectives-2.html
http://www.paulnoll.com/Books/Clear-English/English-adjectives-3.html
http://www.paulnoll.com/Books/Clear-English/English-adjectives-4.html

50 adjectives to describe the personality:
http://www.lingolex.com/personalidad.htm

Order of Adjectives in English:

Exercises: