Joomla theme Customization for dance association

General information for the website: Small dance association
Kind of development: Customization of existing website
Description of every page/module: Hello,
i search Joomla expert.
On joomla theme : jm-galeria, i need some customisations :

1°) remove background on language selector on Chrome : http://awesomescreenshot.com/0632pr0x4d

2°) Solve responsive problm ...
menu, logo, margin between elements, other things to have beautifull site on all platform...

3°) Add animation css effect on the 3 pictures : http://awesomescreenshot.com/0002pr1b50
smooth effect.

4°) Add parralax and module position ( template ready) and add video lightbox (with jce editor)

5°) activate language autodetection (actualy, there are 2 languages)

6°) block modifications on template admin
Description of requirements/features: E
Extra services needed: Customization, Optimization
Specific technologies required: JOOMLA
Extra notes: