There aren't any universal meanings for all tattoo symbols. Check out tattoo symbolism here: http://tattoo.about.com/cs/beginners/a/symbols_intro.htm But remember, sometimes a rose is just a rose. It doesn't mean or symbolize anything!
You cannot get a temporary death bat tattoo anywhere. However, you can get a permanent tattoo, as most tattoo artists can give you one. You can now remove your death bat tattoo once you're done with it.
A dagger and dragon tattoo can symbolize several different things. It can symbolize courage, strength, or perseverance for example. Tattoos are very personal, and each person has their own beliefs as to what their specific tattoo symbolizes.