Buy a million in credits and spend the rest on tacos.

do charity works

Cocaine. Lots and lots of Cocaine. 

If i won 78million i'd buy a house, get married, have more kids, buy a bigger TV 

I'd become a super villain.

Like hearing all the people talking invest. Always gotta makes sure your money makes money. I'd pay off the rest of my parents house and get that out the way and then put some money into buying up real estate. Cleaning and fixing up houses and apartments and renting them or selling them out for a higher return or a steady flow of income. I'd keep working if it was possible to stay low profile. Gotta make sure the money keeps coming in but I'd be retiring around 40 or 50 and hopefully have enough to live off of for the rest of that lifetime. Just gotta be smart with it

I would buy a super car, buy my old company outright and fire the old boss just cos i can :-)

invest, but also make sure my wife and i could both get the degree we want, and then live off interest and do some good in the world

Hmmm, most likely buy an island and hire a few staff to do all the chores and make my food/cocktails. A gym would also be essential although I suppose I could run laps around my island to stay fit.

Fly to Ireland and then pay a hitman 5 million pounds to kill a guy

I would probably use it to travel, even though it would be a little selfish.. Like maybe I would pay off any debts and maybe secure my future kids' well being and then I would go travel 

Invest in real estate as it is a safe investment. That way, my capital would grow a lot. Of course, I would have money to spend for things that I want: a beautiful gaming room with great hardware/software. Also, a  nice  house. Doesn't have to be big, but as long as the essentials are there, I'm happy.

id pay off my loans and debt... and donate to charity. buy a house and put the rest in saving and live off  intrest