Someone please help me answer my questions regarding The Sims 2 : Open for Business?

1) when i open a business, i was told that i can either sell items or provide services (if i am not wrong). explain "provide services".

2) i wanted to open a restaurant, with my sim as the chef and cook food for other people to eat. can i do this? if yes, how so? people came, people shop. they don't eat, do they? even if they eat, they don't pay.

3) my sim just bought a community lot. i can go there and set up my shop, but where do my sim sleep if he were to stay a night? in the community lot or go back home? doesn't staying in the shop mean the shop(community lot) is my sim's second home?

1) Services are charging people to use items. The only way to start a service is to buy a ticket machine. Parks, plazas, arcades. They are all services.

2)You need to have the following and you need people working at them:
Restaraunt Stove ( the big silver one)
A sink
The podium
At least one table or counter
A waiter

3) Your sims can't sleep on community lots. They can only drink coffee to replenish their energy.

Well, I know that one service you can provide is makeovers. You get the makeover chair and you can change all the NPCs looks.
For a restaurant, you need a chef, a hostess to seat people (and the podium) and a waiter/ess.
And, your sim has to come back home to sleep. You can do everything in a community lot but that. You can take a shower to get hygiene up (or a whore's bath in the sink....), eat, go potty, have fun, everything but sleep. So go home, you workaholic! :)