Basically, you have to replace the whole line. Because of pressure inside it's unlikely you will be able to solder it or weld (brake fluid is flammable). For that you will have to remove all holders disconnect it from the distributor and the wheel (it might be extremely hard to loosen it, prior loosing the line use Deep Creep from Seafoam in advance: 24 hours at least). Depending on city a line might cost about $40-70 maybe more.
I don't know about the 91, but the 04 has the high/low switch in the liquid line[the small line] over on the passenger side adjacent to the condenser[in front of the radiator] Look for a sensor with electrical leads.
Yes, there is a diagram for the front brakes on an 89 Toyota Camry. It will show everything needed, and it is found in this cars maintenance manual.
Our Toyota dealer has estimated to be around $300.
I am guessing that you mean the low pressure side of the AC system. Find the larger line between the compressor and where it enters the fire wall. You will find a cap for the low side. That is where refrigerant is introduced into the system.
Look under the passenger side floor pan where the fire wall begins.
I believe that this filter is a perminant part of the fuel pump. You can install a 2nd in line if you want but there is no need
I have a 97 Toyota Camry and was told it would be anywhere from $1000 to $1600 depending on whether I wanted top of the line struts or not.
Toyota Master Line was created in 1962.
You will have to replace the broken component. With out knowing what line broke, or what part the line broke off of, I can not give a better answer.
tooth broke off at gum line
Toyota's High trim cars are Lexus line. Scion is their budget/entry level line.
check on line or at your local Toyota dealer.