Is this too much rust to repair?
No, i do not think so.
The rust on the solid steel of the frame has not reached the cancerous stage, It is mostly surface rust and can be remedied.
The rust on the sheet metal is a little deeper but it does not look like it is terrible or causing structural problems.
There is no way for us to give you any idea on costs.
Do your research on dealing with rust and once you have dealt with it you may consider an undercoating to extend the life of your car. (There are pros and cons to undercoating, if the roads in your area are salted for snow and ice it may be beneficial.)