Thank you alcjphil for the heads up regarding the disassembly. Somehow I think that the advice which I have received and talking to a young man who is a neighbour, that I will just clean up my new treasure and be content to ride it as is until I get familiar with this type of bike. It seems, in my ignorance, that I have bought the lowest level of MTB of the many models that are available on the market. Never the less my initial investment of $15 is a very small amount considering the education which I am getting from yourself and the other knowledgeable family members here on the forum in the last couple of days.
Regards
Jim.