Hi Sena,
1. Make sure to add the search instance ID to the arguments: https://onlinemizoram.com/wp-json/ajax-search-pro/v0/woo_search?s=test&id=1
Here it’s set to 1, but in your case it’s probably different.
The current v0 API does not support more arguments unfortunately. They will be added later when a more stable v1 is released in the future.
2. That is the image which Ajax Search Pro fetched for the live search results, it is always going to be a single image. If you need more images, you may have to either edit the source code on the API, or use a custom code to add more fields to the asp_data object, or pass on the product IDs to another endpoint to fetch the other images.