However, Trex saves cost of having to stain every year, and may last longer?

(Assuming you can't stain them).

Carpet is actually in pretty good condition/stain and tear free. 

It’s solid wood, and if it wasn’t stained previously, it’s a thin outer layer that needs to be removed to refinish it properly.

We are happy to save on flooring now we have to sand and stain the floors but have no clue what to do.

I had some long term tenants who would let coffee drops sit and stain the white cabinets and another that looks like they didnt clean the tub in months. cleaners did the best they could, but it still didnt look like new and had a slight stain.  

This cuts the kitchen greases and deglosses the cabinets (prepping them to take the new stain/poly--which comes next).

When you realize that these agents are applying for a job, you will intentionally notice things about them that you wouldn't be thinking about otherwise; their appearance (are they groomed and well dressed or are there pizza stains on their t-shirt and shorts), are they knowledgeable in the field of real estate (if your agent cannot explain how the whole process works in their listing appointment, move on), how responsive are they (if it consistently takes 3+ phone calls to get ahold of them during normal business hours, do you expect them to answer the phone when the perfect buyer wants a showing during weird hours- probably not and you are going to miss out on a sale). 

The ceiling is a popcorn ceiling that was repainted originally with a glossy paint to most likely cover the smoke stain. 

I suppose some smoke stain?