My toyota landcruiser prado is a *** import i have had it in the uk for 4 years now ,recently i have been having problems with smoke from the exhaust and a screaming noise when using the air con ,when i lift the bonnet on the left hand side there is alot of oil there ,also just yesterday when i started it up the 2nd start light came on ,what does this mean ,also having problems with the battery going flat and they are fairly new batteries ,the car was serviced in october 2010 and has a 3 litre diesel engine and is an automatic