First time printing at photolab

Up 'til now I've only printed the occasional image on my home printer (HP PSC 750) and haven't bothered too much about the quality of those prints - they're sufficient for my purposes.
However, I now want to get some large prints done professionally at a photolab (maybe up to 10x8 or thereabouts) and I was seeking some advice as to settings. These are going to sound like dumb questions but they're coming from someone who has never had prints done at a lab..
Should I shoot RAW and submit the original RAW files to the lab?
Should I shoot RAW, convert to TIFF or JPEG then submit those files?
If so, what resolution should I resize to?
Is RGB okay or should I convert to CMYK or something else?
If RGB, should it be sRGB or something else?
(Ive got PSCS2 for any post-processing work required)
If shooting JPEG, what size and quality should I set in-camera to get the best final print result?
Can anyone from Brisbane recommend a good lab?
I'd really appreciate any assistance the forum members can offer.
Thanks.
However, I now want to get some large prints done professionally at a photolab (maybe up to 10x8 or thereabouts) and I was seeking some advice as to settings. These are going to sound like dumb questions but they're coming from someone who has never had prints done at a lab..

Should I shoot RAW and submit the original RAW files to the lab?
Should I shoot RAW, convert to TIFF or JPEG then submit those files?
If so, what resolution should I resize to?
Is RGB okay or should I convert to CMYK or something else?
If RGB, should it be sRGB or something else?
(Ive got PSCS2 for any post-processing work required)
If shooting JPEG, what size and quality should I set in-camera to get the best final print result?
Can anyone from Brisbane recommend a good lab?
I'd really appreciate any assistance the forum members can offer.
Thanks.