does that include your hotel budget and your train tickets? if it's just eating, drinking, going around the city and you don't spend a ton of money at restaurants, then that's a lot of money.
lunch special in local restaurant is like 60-70 crowns. dinner at a local place is usually 90-220 crowns. pizza or pasta is 80-140 crowns at a typical italian place. beer in local pub is between 18 and 33 crowns, depending on the pub and the beer. tram/metro ticket is 26 crowns. bottle of water in a potraviny or grocery store is 12-15 crowns.
you can as much as triple these prices if you are in the middle of the tourist zone, but even then, you'll have a hard time spending 9000 crowns in 4 1/2 days.
watch your pack/cash on metro and around tourist sites.
basic phrases (roll the r's):
dobry den (dough-bree-den) = good day. say it whenever you go into a store or resturant. everyone else does.
prosim (pro-seem) = please.
jizdenka (yiz-dane-ka) = ticket
pivo (pee-vo) = beer
fyi, many of the trains to/from dresden depart from holesovice station, not from the main train station (hlavni nadrazi), so check carefully. both are on the same metro line...it's not hard to get to, but common and annoying error for tourists. a great train ride, by the way, goes up the labe/elbe river valley once you get out of prague about an hour. and if you have time to kill, i'd even recommend stopping at one of the czech cities in between on the way there or back: decin or usti n.L. things are even cheaper there (i think i had a beer for 13 crowns in the decin station).