5. I imagine the above queries are easy to answer to most of the posters here, are there any books which would help me with my simplistic queries?
Sheldon Brown's website has a lot of useful tips for bike maintenance and repair - although personally I find he has a tendency to give the impression that you can improvise a lot of tools even as an inexperienced mechanic. My
experience is that it's less frustrating in the long run to find the right tools in the first place...
Park Tool's site is good too.
The best guide for mechanics is the Barnett Manual. You have to subscribe to it but then you get regular updates. You may be able to find older editions on the internet if you search around - although these may be in breach of copyright. This manual is really well written and goes through things in clear steps. It covers things in proper detail which is better for a novice mechanic.
Most of the print books on bike repair are not worth bothering with. They are either slightly out of date or don't go into enough detail for any but really basic repairs.