Countries where avoidance of travel is recommended will have Travel Warnings as well as Consular Information Sheets. Bank transfers take several days. Dollar traveller's cheques are advisable as some US banks refuse to cash Sterling or Eurocheques.
Crimes of violence are common especially in large cities.
Seek advice locally on areas to be avoided. Stay in the main tourist areas and be security conscious at all times. Ask directions from the rental company and stay on main highways. Leave spare cash, passports, tickets and valuables in a safe place, eg hotel safe. Never leave valuables in a parked car.