Ok eliminating the obvious spelling mistake "familier", which would not be acceptable in any correspondence with clients, you say you have a business degree, in what !

I know personally, as do many, people leaving Uni with degrees over hear and working in McDonalds as they can't get work, a degree will never replace experience.

I will go easy on you, unlike my normal response.

You have n o idea if you need to ask what camera or lens to buy, join a camera club, you are doomed to fail.

1. Join a club
2. Use the SEARCH tab above for "starting a business"
3. you will need
1. Public liability insurance
2. Public indemnity insurance
3. A website
4. A good portfolio
5. More gear than YOU are planning on, TWO cameras not one, what do you do half way through a shoot and one packs up, apologize, minimum of two lights, I don't use studio lights I prefer flash and by that I don't mean studio flash either U ise 2x Metz 45 CL-4 digitals with quantum batteries, and two fill flash when needed, umbrellas and diffusers, cost £2000
6. Don't forget a decent tripod and head £200+
7. Fast SD cards I use 12, studio work so a flash meter, props, seating, changing areas, etc.

You ask if the 600D is professional enough, professional enough for what, taking a photograph ;)

Give a pro a bridge camera and an amateur a Pentax645D and I know who will do better, you don't just "start" taking photographs for money, it takes experience.

You did ask.

Good luck

Pounder35 said it all.