Does anyone know costs ot admissions to sights in Prague?
thank you.

Go google the sites you want to see and check their webpages.

Do your own homework -- we don't know what "sights" you're talking about.

every price from Free to several hundred czech crowns,where are you going?

unclegus,
unclear what sites. Taking a teenager and sites will depend on his interest once we get there.

Looking at castle and museums.

Would you not see something because it costs money? Can you explain why it's important to you to know what things cost? I'm assuming you're traveling a distance to see Prague and would you deny yourself some sights while there?

What things cost in Prague in CZK:

Synagogue combo ticket - 480
Castle - short ticket - 250
St Nicholas Church - 70
Loreto Church - 110
Mucha Museum - 136 with discount ticket
Municipal House - 180

PS: Guide books give this information and will offer a comprehensive list of Prague sights.

Adrienne,
Couldn't find in my guide book..maybe not looking in right place.

Agree with youru comments but want to get a handle on expenses.
Thanks

Usually prices on admissions are at the end of the description of the sight, along with opening days/times. Try Let's Go, Lonely Planet, Fodors guides for pricing on other places that I didn't go to. The prices have a wide rannge in Prague. Most of the churches are free.

http://www.prague.net/sightseeing
have a look at this website it lists all the main attractions with opening hours ,how to get there and prices.
some of it is a bit out of date but you will get a general idea.
there are also links to info on Prague's superb and very cheap transport system.

If you have a teenager with you take them 10 pin bowling ,very cheap in Prague,less than half the price i pay in the UK.
many parts of the castle complex are free and you can get into the main part of St.Vitus cathedral for free.i was up there a couple of weeks ago with my nephew and his friend( both early 20's) we gave the cathedral a miss due to the huge queues,but if youu get there early(ie before 10.00am) then it should not be a problem.