i found few problem for my premium theme

Hi Support Team ,
I would like to thank you for wonderful theme . I have successfully installed this theme on my website www.epcskills.com .
There are few things I am not able to do .these are :
1. there are lot of plugins i am unable to use in my website .
2.these is no custom post template in premium theme. I want to create “custom post template”
when i installed this plugin then also it is not working with vantage premium theme.
3. I want to remove previous and next post function from default post ( previus post as Civil and Structure , next post instrumentation post for this post )
http://www.epcskills.com/electrical/electrical-post/
4. home page is not responsive
in mobile /tab display home search box is not visible .
I am not found of code therefore I request you to please update the same and revert it back . I shall be ouliged for your help .

URL: http://www.epcskills.com