In my honest opinion - If you don't know how much money you will need to startup then you are nowhere near ready.
You will need a business plan for starters (before you even approach a bank) and you will need to sit down and think of every cost possible for starting this business, a simple list would be:
- Premises
- Stock
- Fixtures & Fittings
- Equipment (Till etc)
- Sign writting
- advertising
- New van for trips to the cash and carry
- Legal fees (companies house, accountant etc)
The list is far from complete and just what I can think of off the top of my head... When you have finished your list and have a total price for your startup add about 10-15% on for things you have bound to have forgotten!
On the PLUS side, banks do like you to put some of your own money into these things - the more the better
