I recommend one of thefirst things to teach as how to write a letter of application and how to create a CV.
These will be highly relevant and should be motivating, this should enable you to teach more readily.
Try looking up material related to ECDL or CLAIT, for example this will give you some ideas, use search terms such as “ECDL resources free” or perhaps “CLAIT resources free”
http://www.educatorsecdl.com/236_Sample-ECDL-courseware.asp
You will not get much for free as these courses are highly marketised but this will give you some idea.
http://www.teach-ict.com/ecdl/module_1/module_1.htm
I agree that it would be useful to produce a glossary, however what I would do is work out what you are going to teach in a given session and break the glossary down so that it is relevant to just the one you are doing.
You could also produce a crossword or perhaps a wordsearch with various terms - this would be very useful.
Don’t get involved in the hardware side of things at all except where it is absolutely necassary, you may find it very useful to get the learner to sign up to a message board in a subject they are interested in, might be cars, bikes, sport, whatever - thing is, it teaches other skills beside the strict ‘learning about computors’ because, as you will no doubt know, what this person needs is to place computors in a real context and relevant to them, that will spur them on to other things.
From your outline of the learner, it’s more than computor skills they need, confience to try things will be important in so many ways - what I’m trying to get at is that you may need to look at the whole package and not just the skills.
Reassurance will be important, they can’t break anything - especially if you set up an account on whichever system so thay can’t delete anything important.
Give them as much material that they can do without your input, trust me on this.