Good sources for images,

morgueFile.com, free

istockphoto.com, cost, credits ($1 – $2/credit)

grabCAD.com, free

flickr.com, and also creative commons

https://creativecommons.com

gettyimages

Getty Images free, 35 million – non-commercial use

copy the html, and insert in page

Often for personal website, can get permission. For commercial use, be sure permissions are obtained.