Does this come with a mouse and keyboard?

No, there is no mention of a mouse and keyboard being included with this product.

Questions & Answers: Refurbished: Dell OptiPlex 7050 Micro Form Factor - Intel Core i5-6500T 2.5GHz - 8 GB DDR4 RAM - 256GB SSD - Windows 10 Pro - HDMI - AC Adapter Included - TFF

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Dell OptiPlex 7050 Micro Form Factor - Intel Core i5-6500T 2.5GHz - 8 GB DDR4 RAM - 256GB SSD - Windows 10 Pro - HDMI - AC Adapter Included - TFF