Hey guys,
I am facing wierd sound problem with my Suzuki cultus,
When I start my car from a cold state it doesnt starts in the first attempt, i had to try it 3-4 times. My car is on petrol

Secondly whenever i put the reverse gear for the first time after starting the car it make a wired sound like the one coming when clutch is not pushed completly.... after running car for a minute or two that sound never comes....
Thirdly I gave my car for servicing yesterday, mechanic changed the back break shoe, oils, n filters. Today when i was driving i feel like my cars speed is slower.
Fourthly the mechanic said both of my silencer tolkies are in bad shape, how to check that, my car is making a noise probably due to silencer but its not too much and it started a week ago.
Please reply to these questions.
Thanks