My timing belt snapped today and so I am in the process of replacing it. I am right in the middle of it tonight (driveway, 34C) and I could you some advice on the following...its a 93 GS 5spd

1) How do I determine TDC on cyl 1.

2) How to "break"/remove the crank shaft bolt, engine keeps turning over..?

3) What else should I be replacing well I am at it?
timing belt (of course)
waterpump ?
belt tensioner thingy ?
other belts ?

4) Any little hidden pitfalls I should be aware of?

Any advice appreciated.

Thanks,

Ben
Toronto