Just bought 2002 focus 1.8tdci, got few minor problems if anyone could help?

Hi all

I bought this focus about 3 weeks ago and I'm seriously happy with it, especially the mpg. So I've noticed a few problems and was hoping to get some answers. I had my car in the garage last week and got a nice quote on the near side drive shaft to be replaced at £190, that's £85 for the drive shaft £35 for tracking and the rest is labour.

As I don't have that kind of money I was wondering could I do it my self and what tools will i need?

I can borrow tools and I've got a Haynes manual.

Also when doing 50 mph and above I seem to be forever correcting my steering and its really hard to keep it in a straight line, the tracking does need doing so could it be that?

When starting the car for the first time i have to keep the key turned as it seems to struggle and strike up 2nd turn if that makes sence?

And finally I'm going to give the car a service, fuel filter, oil filter, oil ect. Is there anything else I could do? Brakes don't need bleeding they feel sharp.

If the any of you kind people could help in any way i would be most grateful

Thanks
Chev

PS. If any of you kind people could recommend places to buy parts from at a reasonable price, that would be most grateful