Please! Anyone can help?

I and my parents would like to pay a visit to our cousins in Shantou (during late September). We plan to travel to Hongkong first, perhaps stay there for a few days (shopping, eating etc.), then we would like to travel to Shantou.

So, can anyone suggest how we could find a good and reliable taxi service (for travel convenience) from Hongkong to Shantou, and also from Shantou back to Hongkong. How much would it cost and how long would it takes? Any website on this information? Also, we plan to stay in Shantou for a couple of days, can anyone recommend a good hotel?

Please help! Thank you in advance!

Apisak