What tools should I buy?... 
...

Harbor Freight is a good place to buy usable quality tools at a reasonable price, if there's one near you...
-Get variety pack of screwdrivers,... (also, a bit driver/with a variety pack of screwdriver tips)...
-Metric socket set,..
-Metric combination wrench set (look for one that includes a 14mm)(must go up to 24mm)...
-at least one pair of vise grips...
-One 32mm 1/2" drive socket and a breaker bar...
-A set of feeler gauges...
-a set of metric allen head wrenches... (and a 3/8" drive allen head socket set)...
-a ball peen hammer,.. and a rubber mallet...
-an impact driver...
-an electric screwdriver (Black and Decker/ lithuim is good, $20 at Lowes, or HomeDepot)...
-A variable speed electric drill, and set of drill bits...
-a set of pliers...
-a set of crescent wrenches...
-an oil drain pan... (or, just an old 4qt pan, not too tall)...
-can of penetrating oil...
-can of lube...
-tube of red/blue locktite...
-tube of anti-seize...
-can of carb cleaner...
-can of brake cleaner...
- tube of Hondabond,or Yamabond...
-a good pile of rags...
-hand cleaner...

...
NOTE: Some screw heads are not phillips head, but JIS (Japanese spec)... a good phillips will generally do the job, but,...
... a set of special JIS tip screwdrivers can be helpful with stubborn screws...
They're not easy to find, and can be pricey...
Here's a link to some, if you want to invest in a better than basic kit...
http://www.centralhobbies.com/Tools/jis.html$22 bucks for 4...
I don't have them myself...

...