its cool!. just make sure they are soaked in penertrating fluid for a while and go slow dont want the bolt snapping if they are in bad shape!
If they are not seized they will be fine
i wouldnt say so i havent used a either. ... but iv got a big jack (wouldnt trust the standard one) could use axle stands if you wanted though
thats what i use. socket and big juicer bar to make sure they on tight!
As said above, don't bother with a torque wrench just make sure you use a decent jack and the car is always well supported. Also a long piece of pipe won't go amiss in case you get to some particularly tricky bolts