Mustafa I know that you are not a pro but Super 8 and normal 8 deserve pro treatment in my opinion they have HD Resolution and a Telecine should be done at High Resolution either HD or 2K. For beautiful examples of Super 8 transfers take a look at the Cinelicious site http://cinelicious.tv/
Reversal Film is contrasty the Foma stuff even more so Wittner sells Kodak Tri-X and Plus-X which should be less contrasty. A blue filter or better a Low-Con Filter should reduce the contrast a bit, so should a bit of pulling (around 1/2 stop) Good Luck