Robots.txt or how to hide pages from SEO

Hi I am not so familiar with Robots.txt and not sure if that is what I am looking for, My goal is to hide some urls, from search engines, as they were genereated by the theme I used, but not valueble for end users. I already have a sitemap, but it includes some urls-xmls which I do not want to SEO. Which wold be the simplest way to accomplish this? Perpahs using SmartCrawl Pro?

Examples of links/sitema I want hide are:
https://inmobiliariacdmx.com.mx/estate_agent-sitemap.xml
https://inmobiliariacdmx.com.mx/colonia/granada/
and many more..