It is possible to create a website from the JPG but it is not advisable. There are a couple of good reasons for this. Two important ones are to do with Text and Design.
- If it is simply and image then there will be no text which means it will be very difficult to be found by any search engine. This is the case whether you put it up as one large JPG or multiple smaller ones.
- I suspect the JPGs are from a printed brochure. Not unreasonably people might think that this translates pretty simply to online. It doesn't. The layout for online and the motivation in design for online is very different to print. In online you are often looking to provide the next action from the homepage. In print it is static.
All that said to answer your actual question. Yes you would need to put the JPG and the text in tags.
At its simplest you could just have:
<head><title>Title of your page</title></head>