vauxhal astra saloon 1.6(1997-98)

[jitu]

i bought vauxhal astra saloon 1.6(1997-98)second hand car just before 6 months ago but i m unaware of the problem at that time ,but now when i start the engine i can hear a sound in the engine belt very loudly and after some run it stops but now sometimes its hear continously.the second problem is that the car does'nt catch the pick up quickly it takes long run to catch the pick up.
so can u give me the perfect idea and solution about it..

yours thanksful..
jit