yes, in the career mode there is an option where you can "free roam" the city of seacrest.
No there is not
Yea, the statement "Over 100 miles of open high speed roads" confirms this.
All you have to do is press (Y) when you have highlighted a race or police event.
It is not possible to free roam on Need for Speed Undercover for the DS. It is possible in other versions.
Go to career and push free roam
Yes
No
In searching for a treadmill recently myself I have learned that it is very important to look for one that is durable! This being said, if it looks cheap walk away! Also, look for one that has an incline, this maximizes your results!
You cant
No it does not it only has races
yes
Yes you can, go to continue career, then inside the safehouse menu, select free roam.