A: How do I bleed brakes on a 2005 Camry and what is the proper sequence?

Yoy can purchase one person bleeder kit (however the common procedure requires two persons for that task). I personally use Actron's Vacuum Pump/Bleeder Kit. It includes adequate instructions. Common bleeding sequence is: right rear, left rear, right front, left front. It is because you have to go from furthest bleeder from your car's brake pump (right rear bleeder) to the closest one (left front bleeder).

A: why is there blue smoke coming from tailpipe?

The engine problem. Check cylinders' pressure. You can buy special tool from for example Actron or if you are not experienced amateur mechanic yourself - go to mechanic shop. It shouldn't be costly since it is very cheap and common examination for engine.

A: What does this sign means (_!_)??

It means that you are bad driver so your car shows you that sign.

A: What is a reasonable cost of spart plug replacement??

It is easiest service could be done. Only oil change is comparable in terms of prices of labor costs. If you had a 6 cylinder model of Camry then it's a different story since 3 three of 6-pack of spark plugs are difficult to reach. But yours is 4 cylinder model. Just buy 4 NGK, Autolite, Bosch or Champion plugs and go to mechanic's shop to change them. These leading plugs are definitely less costly than 23$ per one plug which is ridicolous price. You could also buy polish plugs of company "Iskra" which are best in the world and cheapest at the same time - sorry, now I am joking since I live in Poland and I make "hidden" promotion of my country's automotive manufacturer - but in fact I use these polish plugs.