Toilets are relatively easy to work on, and don't require anything not found in a standard home tool kit. Toilet Repair Tools you need include:
Adjustable wrench
4- In -1 Screwdriver
Pliers
Vice Grips
Hacksaw (if you're installing new flange bolts - That do not have EZ snap-off marks)
Shallow Water Bucket - To catch toilet tank water.
Soft towel or Sponge for the cleanup