New To Mac Using Air For Travelling Sales And Usual Personal Stuff

We ahve taken the Mac plunge.We purchased an 21.5' iMac and 13" Air refurbished, both are X 10.7 with the extended care and 1 to 1 for both of us.I am also picking up a new Timecapsule 2TB.I am wondering about questions of setup and apps to use.We are clumsy with this stuff and only familiar with MS Office and Outlook.Our use does not include gaming, music, or hardcore picture manipulations.My business use does not require building spreadsheets and usually viewing only.I have not used Powerpoint type presentations but am preparing to learn to.I also plan to add simple graphics skills to draw simple tooling schematics.I am in the oilpatch service industry in Canada.We like simple clean programs that do not shove prompts down your throat ot presume to know what we want.Dare I say we are very tired of the bloated insecure world of PCs, no insult intended.We don't need endless fonts and templates.

Is MS Office for Mac a requirement? Will Works do what we need? Will Safari replace Outlook or would you pick another app like Firefox? What about search engines for Mac? What virus protection programs and utilities are handiest?Using hindsight if you were making tha transition to Apple this week what would be your basic setup decisions?The biggest concern is will I be compatible with my business colleagues?

Info:
MacBook Air, Mac OS X (10.7)