Shopify Out Of Sand Box customizing development

Hello we are using [login to view URL] theme. we want some improvements on theme I mentioned below. 1- How soon it ends. 2- What's the fare. 3-Do you support at the end of work (after development) [login to view URL] codes to be written should be written clean. should not affect site speed. [login to view URL] write to those who can reference Desired improvements. [login to view URL] should be able to login with their facebook and google accounts. The user input menu will be drop down window. will be as in the example. [login to view URL] 2 . I Agree To Terms checkbox under user input field. 3.. non-mandatory newsletter checkbox (I'm open to your free app suggestion) [login to view URL] the header field we want a field where the search word will be written instead of the current search icon. 5-The wishlist should have an empty heart icon in all areas of the products. After adding the user, the user should be able to see them in the account / wishlist section in the added order. For guests, wishlists should be stored until the browser tools are cleared. 6 -There will be a wishlist icon in the header field. 7- There should be a drop down menu when it comes to my account icon. wishlist, my cart will be added here. 8-When the end of each purchase is reached, next to or next to the make payment button, the automatic filled-in pre-distance sales contract is presented to the user and payment cannot be made without checking the checkbox. thank you