The best thing would have been to be more aware of the background when taking the photo and repositioning yourself to shoot from a different angle. It also may have helped to use a different lens or use different lens aperture. If you absolutely had to shoot the car from this angle, have the owner move the car to a better location, with less background distractions, etc.

With only this image to work with...

While you can edit out the background... and artBob did a good job of it... in my opinion that sort of takes the subject out of context of the car show.

If it were me, I'd use several different techniques (hard to do very well on this very small version of the image, but below can give you some idea how it might be done)..

1. Eliminate some of the foreground and background objects (Photoshop clone tool).

2. Change the color of some background objects, especially what's seen through the car's windshield (Photoshop color replacement brush).

3. Blur down the background as might be seen if a larger lens aperture were used (Photoshop gaussian blur filter, and layer & masks).

This is a photo I took at the Concours of America in July. Taken with a Nikon D4300 using the 18-55mm kit zoom lens. Shot at ISO 100, 55mm, f5.6 and 1/250. It's a one off 1946 Fiat 1100C Spider by Carrozzeria Frua. So my question is what, if any software can eliminate the distractions in the background (windshield area and across. I know I can crop the left side to remove the taillight. As many of you know, cars shows can be a challenge in many ways and I'm still learning to use manual mode. I thought this was one of my better photos (composition wise) and would like to be able to edit out the distractions. I notice a lot of you use products such as Lightroom and wonder if any of these can be used for scenarios like this. I have iMac's Photos and Nikon software, but have not gotten far with that. Just don't want to buy something and find it doesn't do more that what I already have. I don't need to break the bank either. This is a hobby, said most of us after our last equipment purchase. LOL Feel free to critique the photo as well. It's how I will learn.

The OP wrote, "So my question is what, if any software can eliminate the distractions in the background (windshield area and across)...I would like to be able to edit out the distractions..."

The OP is inexperienced in post-processing. The replies have answered the original questions with demonstrations and information relating to the complexity of the task, as well as with suggestions for future (e.g. depth of field). Relatively speaking, this has been a most excellent topic