I dont think theres a true way to see how long the belt has been in use. My advise; Dont fuck with the timing belt! Just change it and forget about it, otherwise you will have hell to pay if it snaps.

 

would it stall

 

how munch should i expect to pay,or maybe i can do it myself,how difficult

 

It's not too hard if you have a repair manual, keeping in mind I've not yet had the pleasure of doing this.

As for parking, I normally don't even use my e-brake, I just leave it in reverse. If on a hill, you should use the e-brake along w/ reverse to be on the safe side. You don't have to worry about it stalling, just put it in gear while the clutch pedal is on the floor, whether or not the engine is still running. When the engine is off you let up the pedal and it will stay in gear.

Any gear will do in most cases, but the manual states reverse. It's short like 1st so it works well for holding the car in place and, once the car has moved an inch or two, there's less chance of it slipping out of gear (see: impossible) than if left in first - although that's also unlikely.
I believe it's also supposed to be better in the long term as far as how the linkage "wears in" but I can't say for sure on that.

 

what a great help about the parking and it really help me alot on hill,thanks

 

im in the city with so many traffic everyday stop and go,and i hate shifting from 1st to 2nd gear,can i start from second gear,so i can shift less.

 

ehh, you can, but your clutch life will be greatly depreciated unless you build the car some so it can easily take off in second instead of slipping the clutch while releasing it

 

This guy is jerkeing you all around, I smell a troll. Hey man just park it on a big hill put it in 5th gear with no e-brake and you should be fine.