You should pay an application fee of £298 and a Immigration Health Surcharge fee of £1,035 per year. In addition, you must have at least £1,270 in your bank account to show that you can support yourself once you arrive in the UK.
The decision to issue a visa is made within 3–8 weeks, depending on your location.
All the above may change with government policy, please check the Home Office website or with a qualified Immigration Advisor.