Shopping in Munich
If you run out of films you can go nearly anywhere. There are enough photo shops in the city centre and you can get everything you want there. Even department stores are no bad address. If you are in a hurry you can look for a development service which delivers your negatives within 1 hour. Simply look for something written on the shops window that looks like "1 Stunde" or "60 Minuten" and ask.
Everything you do not need
Normal souvenirs can be found in all department stores, souvenir shops sell the same stuff but for the double price. Just for fun you can jump into the "Schuldenberg". This shop sells really everything you do not need. Take U3 or U6 to Münchner Freiheit and leave the station strait ahead. The "Schuldenberg" is close to the end of the long tunnel.
Everything made from glass can be found in the "Glashaus" at Josephspitalstr. 1, half way between Sendlinger Tor (U1, U2, U3, U6) and Karlsplatz (U4, U5, all S-Bahn).
This section contain recommendations for adults only. If you are younger than 18 you have no access to the shops.
Munich is not Hamburg, but there is no lack for toy shops for adults. Try (e.g.) Budy in the Utzschneiderstraße (more BDSM), Dark Wishes in the Nordendstraße (not far from Kurfürstenplatz, several ladies recommend this shop), Ladies First in the Kurfürstenstraße not far from Kurfürstenplatz (no access for man, couples may go there on Tuesday as far as I know), Spexter or Hard Line in the Müllerstraße (BDSM and a lot of rubber, gay, but ladies are also welcome), Demask at Gabelsbergerstraße close to corner Schleißheimerstraße (good if you are looking for corsets), or one of the well know Beathe Uhse shops in the Neuhauserstraße (mainstream).
The easy way to get what you are looking for is to visit the gay pub Cook on a Thursday evening around 9 p.m. On this day the pub is very BDSM and not so gay, but people tend to drink beer and not to dance or do something else on the table. Simply ask somebody there for personal recommendations.