Where are timing marks located on an unidentified vehicle?

line up the marks on crank shaft gear arrow to arrow, the front cam gear the mark goes to the middle on the rear cam gear the mark goes one notch below front gear mark they line up when the tension is put on belt.

You can rotate the cam/crank into a positon that will not move as you remove the old belt, as long as the new belt places the cam/crank in same position as the old belt had them, it don't matter where the timing marks are. Leave your old belt on, rotate to a position that will not move or have tension on belt, (no matter the marks) and replace the belt. Make sure to recheck timing marks after new belt is installed by rotating the crank/cam back to timing marks, or just trust that the belt was replaced without the cam or crank rotated. Easy off, easy on, just make sure the cam/crank are still in time as the old belt had them located. NOTE: timing marks are there in case of a broke belt, or for a car that has jumped time. As long as cam and crank are held in same positon, and car was in time before the procedure, it don't matter where the timing marks are at during belt replacement.

your best bet would be to go to an auto parts store and buy a haynes manual for your own car.they are about 20-25 dollars. this book will tell you how its done. they are based on a complete teardown of vehicle. good-day !

yes it is quite possible that valves are bent if the cam belt broke or teeth stripped off of old belt, which unfortuneately means removing the cylinder head and getting it repaired (valves replaced and possibly guides) see some of my other posts for cam belt timming marks locations etc...
depending what motor is in your vehicle twin cam or single?

and if its twin cam you usually need cam locking tool for cam gears.

You need to specify engine type, but the following videos of the same engine type in MG and Rover cars should help (kv6 petrol 2.5L and rover k series -only single on the last one but similar principle)

The cam and crank has marks that must stay in alignment when you replace the belt, you can make your own marks if you are careful. I would recommend getting a manual that shows the marks locations. Once the new belt is installed, turn the crankshaft by hand until it makes at least two complete revolutions and double check your marks before starting the engine.

I assume you are talking about valve timing not igntion timing. If that is the case your water pump maybe run by the timing belt. If it is you would need to completely disassemble the timing cover and set the number one cylinder to TDC (top dead center) on the Compression stroke not the exhaust stroke. Once you do that line the timing marks up on cam gears with marks on the side of the head. Then install a new timing belt and tensioner. It is a good idea to always change the pump and belt together. I would suggest buying a manual for your specific vehicle for specific torque specs and exact locations of components and procedures.

IF U BROKE THIS BELT WHILE DRIVING U HAVE BENT THE VALVES IN THE ENGINE, THIS IS WHAT IS CALLED AN INTERFERENCE DESIGN ENGINE, THAT MEANS WHEN THE TIMING BELT BREAKS THE PISTONS HIT THE ENGINES VALVES

Go to any autoparts store and get a manual for your vehicle. Installing a timing belt incorrectly can cause major engine damage. If this belt broke while driving you may already have bent valves. Timing belts should be repalced every 60,000 miles.