1. being 5' 10" am i a bit tall to drive it
I'll say no, you should be fine. Though i'm a short ass, so...
2. it'll be used as a daily driver and the occaisonal long trip, how will it handel such trips
Won't have any probs with daily driving and long trips if everything is kept in good order. Just takes a bit more TLC (or MONEY) than your average car to keep in good order, but no more than any other car of its age.
3. where are some good part retailers in the syd area
Better to ask someone from Sydney
4. i think its got a 998 in it at the moment how would i go about putting a larger engine eg. engineers ok, getting an engine, how big could i go engine wise for it
If you are really fair dinkum in a daily driver, i'd go find yourself a reconditioned A+ engine and box (A+ is a late model imported Mini engine, stick round here for a while and you'll learn). Not overly cheap once ya get it recoed, but you will have a very good engine and box.
5.how do i got about gettin it back on the road eg. getting it re rego'd
Depends on the body condition. If the body is fine, then the general rule is $1000 and you'll get a good Mini outa it. That will more than likely be new CV's, new uni's, shocks, plus other stuff you may need.