You could go about pricing carpet and upholstery cleaning services by doing some market research on other companies that offer the same services, potentially calling around just to get a quote. For carpet cleaning, many companies charge based on square footage example $0.20 - $0.40 per square foot or per room $30 - $80 per room. For upholstery cleaning, pricing may vary by furniture piece for example $50 - $150 for a sofa, depending on material and size.
To increase your leads for those services you could consider running a Google Ads campaign, or incorporating those services on your website and targeting it with Local SEO. You would also want to add carpet/upholstery cleaning service to your Google Business Profile.