Laptop dell inspiron 1564 not wokring properly

I had motherboard changed few days ago. The technicain who did it could nt finish because I had removed the hard drive to copy the informaiton somewhere else. He went on and installed the motherboard and sent the computer back to me.

I could not start (after i put the hard drive in place) because start up would fail repeatedly. Therefore I decided to reconfigure and put the disc that came with the computer which in my opinion reinstalled the OS but very strangely i see still my folders there. in a sens ethat is good. but I cant open most of them because the professional Oficce suite is gone.

The biggest problem that i could not solve at that late hour last night was the resolution and the shape of the icon and poctures. the resolution is not good. I am not sure that the new MOBO came witht eh right video card or i still need to do updates and downloads which by the way i cant because I can not access internet because it prompts me for e dial up set up.

anybody can tell me in how big trouble I am in this case. (by the way paid $300 so far] for the MOBO and installing it

thanks