Banker exams

The starting salary of a Bank PO is somewhere between 30-35k and various other benefits depending upon the bank. The total package goes around Rs. 4-6 lakhs per annum depending upon HRA (House Rent Allowance) for a particular city.
Now, after the seventh pay commission is applied (would be done in coming few years) the salaries are sure to rise somewhere between 30-70%. Also, we can expect an annual increment in salary based on increasing DA (dearness allowance) every year.
Add to it a promotion every 4 years (on an average) and a corresponding increase in your salary and benefits, I would say that any Bank PO employee is "settled".
Though it is a far fetched guess, in 10 year time you can expect a salary of 70-100k per month in hand, with many other benefits.
Please understand that in any job (government or private), it takes around 10 years for you to achieve a level that commands good salary, respect and host of benefits. So if you are preparing for an MBA, only look for colleges that can give you an opportunity to get at least a package of Rs. 12-15 lakhs per annum today. My suggestion would be to choose only from top 15-20 B-Schools.

There are 56 months. And, it is enough for preparing if you are determined.
Definitely, 56 hours daily is sufficient for you to clear the exam.
Take a mock test online:
The test will make you aware of the pattern being followed in different sections, level of difficulty and your current status. To know where do I stand? is extremely crucial before you actually put in your time and efforts preparing for a competitive exam.
Go slow, but go in depth.
Once you are done with the analysis part, you should work on the fundamentals.
A. Quantitative Aptitude:
Learn Speed Maths tricks (Many of them are available on Youtube), do a lot of mental Math in everydays life and make yourself able to calculate really fast.
Get an in-depth understanding of chapters such as Simplification, Average, Percentage, Ratio, Profit and Loss and Data Interpretation. Once you become sure about the concepts and your ability to solve them fast try bringing command over other chapters.
B. Reasoning Aptitude:
The topics like Syllogism, Machine Input Output, Puzzle Test, etc carry high weight-age as far as a IBPS PO exam is concerned and with 6 months in hand you can bring an absolute command over these topics provided you know the approach. Do not get worried about the verbal reasoning topics as they take only 1 or 2 months preparation to gain command over.
C. English Language:
For last few years the level of difficulty in this particular section has been increasing and to clear the cut-off you must be a good reader of English Language. Make a habit of reading different pieces of writings; News Articles, Journals, Magazines, etc. Besides, youll to work on your grammar as well.
D. General Awareness:
Preparing for this section seems most cumbersome to most of the students as one has to store a lot of events, dates, names in one's mind with daily happenings at National and International arena. But I would advise you not to do thorough study for this section as it will consume a lot of your precious time.
E. Computer Knowledge:
You need not be a Computer wizard to clear this section just follow online computer section of different website and once you are done with its contents, practice a lot of sample questions either online or offline.
Enroll on a Test Series:
Once you are done with the concept building and practice part the time comes when you need to validate your performance in a real time test scenario. Enroll on a quality test series and save 3 days for 1 test.

Private banks now a days demand MBA with good marks.
Also, it includes good personality.
But for government banks procedure is little different. Clearing entrance examination is must for getting government jobs. Entrance exam which consists of question related to:
Quantitative aptitude
English
Reasoning
General awareness
Computers
It is difficult to clear exam without preparation.
But after preparation, you can clear the exam.
For apply in these examination, you have to be:
Graduate from recognised university around 50% marks.
age-between 21 to 28.
govt time to time publish their vacancy in employment newspaper (comes weekly)and other newspapers.
read them regularly.