I think you may be in "a bit of a pickle". According to the
Microsoft compatibility center 32-bit W7 will not help.
Even AutoCad LT 2009 (Version 17) is not compatible with W7 32 or 64bit - the recommendation is to update to Autocad LT 2010 (Version 18). I'm afraid the same is true of Office, they recommend 2003 or better.
You could upgrade to W7 Professional and use the Virtual PC - XP mode as suggested and your autocad MAY work but I fear it may be extremely slow. I hope your laptop has 4 GB of memory as such applications are memory intensive on top of the extra memory needed to support the virtual environment. Since Autocad LT 2011 runs about US$800 it may be much cheaper to upgrade to Professional and even add memory but I would suggest trying your software on someone else's machine who has Professional and Virtual PC - XP mode to verify it does install and function satisfactory before committing to that solution. The anytime upgrade from home premium to professional runs about US$80 at amazon.com. If you bought more memory it would depend on if you have an extra slot or had to replace all that was in the unit and what type was needed.
As for office, if you cannot afford to upgrade, it would likely work in the Virtual XP if you go that route, but I would suggest you consider Open Office as a free alternative. Please see the
recommended freeware section for Open Office as well as some information regarding Virtual PC - XP mode.