will they not supply you masonary bits? Fair enough most jobs require you to supply hand tools but any drills etc. and especially consumables like drill bits should be supplied by the employer!
Having said that its always nice to have your own collection, I have never bought any of them though only aquired!
When chasing walls, I think you should never go more than 25% of the depth of the depth of the wall. However the chasing machine is all setup for depth etc. then you just start smashing it out. Luckily we always have chasing contractor to do all that, so I usually avoid wall clouting.
One of the best tips though, always have a lump hammer you can easily manage, too big and your wrists will ache within an hour!
Good luck with the job mate!