You haven't provided enough information to even begin to provide a diagnosis of the knocking but from your tyre description it is clear the vehicle should have a thorough safety inspection and any unacceptable parts replaced and then finish with an alignment check and adjust.
Tyres wearing on the inside shoulders would indicate the front wheels are toeing out too much (or the camber angle is wrong) and a life of less than 1000km indicates the problem is severe. While maladjustment is possible, this sort of thing is usually caused by accidental damage or the serious wear of one or more steering or suspension components.
Answers & Comments
You haven't provided enough information to even begin to provide a diagnosis of the knocking but from your tyre description it is clear the vehicle should have a thorough safety inspection and any unacceptable parts replaced and then finish with an alignment check and adjust.
Tyres wearing on the inside shoulders would indicate the front wheels are toeing out too much (or the camber angle is wrong) and a life of less than 1000km indicates the problem is severe. While maladjustment is possible, this sort of thing is usually caused by accidental damage or the serious wear of one or more steering or suspension components.