PK SAHU,
Your query does not comply the Rules of SCN. Also All-in-One general query would never attract quality answers. However I am giving point-by-point replies/comments.
- Go through these links. You'll get tons of material to understand Fleet management. (Also search with similar specific strings)
- Prerequisite is obviously Customization: See this Configuration document: Configuring Fleet Management
- Refer to above document, It is there.
- Mostly Fleet is Equipment master. All Tcodes relevant to Equipments and Measuring points etc are suitable. All rest of the tcodes are PM tcodes if you talk about Maintenance Processing. There are few exclusive tcodes available for Fleet management part of which you'd come to know through the above document. However, I am giving here the link for these tcodes: Fleet Management tcodes (This also you need not post here to know. You'd easily get through Google).
- It depends upon your requirement. Come with specific requirement for an enhancement, you'll get it.
Hope you get the message.
Good luck
KJogeswaraRao