Things like legal expenses, solicitor and conveyance fees, any surveys that you may require and any necessary decorating expenses.
Broadly speaking, there are two different types of mortgage: repayment and interest only. The efficacy of the two depends entirely on your financial circumstances.
This is actually a very good idea and should not be a problem. However, for the sake of etiquette, ask the seller's permission before snapping away.
This information could prove very useful. For example, if it is a buyers’ market, you could get away with offering less for the property than you first anticipated.
In Scotland it is, but not in England and Wales.
Not necessarily. Certain areas are designated by the government as 'disadvantaged'. Any property purchase of £150,000 or less in such an area will not require the payment of stamp duty.
If you have any suspicions about a property you are interested in, or if you just want some peace of mind before purchase, then a survey is a good idea.