Right status / structure + Shares

I just got an offer from a UK startup that permits 100% remote work. As such, I need to set up my legal entity in France such that I can invoice the company monthly for my services as a digital marketing/lead generation consultant

Details of the contract:
Fixed annual charge: 72K EUR / Year
Optional bonus: 4-12% ; I am in discussions to have this changed in case this is a problem on my status (can have it given in the form of equity instead)
Share options in the company eq. 650 shares

Can you please advise:
1) What is the best status of company I should open? Am I eligible for a microentreprise; if not then what should be? 
2) Is the 72.5K Revenue limit inclusive of VAT?
3) For my professional expenses, some will be paid directly by the company by its own card, however some I will have to pay out of pocket (e.g. transport, food) - can I get these removed from my expenses?
4) What is the right registration process to follow? I am currently on vacations and was supposed to return to France mid Jan. Can I do this all remotely or should I return immediately?
5) What about shares and equity options received in a company that has not yet done an IPO. How do I declare them?

Kindest
Shahzad