I have an example :
- I have two bikes. Both of them are expensive models. The first one has a red color and the second one has a green color. One of them is damaged because of its old age. And one of them (not the damaged one) also is not in very good condition. I'm afraid.

The main problem is I am using too many words "one", that sounds a little bit "crazy" IMO. Does anyone has any other structure which also can express the similar meaning above?

You could play about with this a bit:

I have two expensive bikes: one red one and one green one. One is old, and neither is in good condition.


Here's a lesson on the use of colons.