New trim/baseboard around the whole house.

Make sure doors have door sweeps, bushes and trees trimmed away from touching structure, ac lines and pipes going into property are sealed (silicone or steel wool), and general holes into property need to be sealed (hydraulic cement is great for patching stone/cement and steel wool for everything else).Then to tackle the interior issues.

Unless you weren't allowed to tour before making an offer, you had the chance to check age of systems, roof, trim, etc. 

I couldn't spend $500k building that thing if I used gold gilded trim....... 

Demo, Frame, Rough Electric, Rough Plumb, Insulate, Sheetrock, Tile, Exterior Trim/Paint, Plumb Materials, ...

To have a good looking sign, lawn care, tree trimmed, and what else from a cosmetic perspective?

You can opt to a 2-tone color scheme with white for doors, trim, ceiling, and an off-white gray for the walls. 

Some people will add quarter-round trim to existing baseboards instead of removing, again adding material and labor costs.  

Paint the columns and the trim under the table white, and do the entry door in a darker, richer color that complements the shingles.Keep in mind, the entry is THE most important feature of the front elevation, so you always want to celebrate it as much as possible.

I found a few differnt grays with white trim works for us the neutral color appeals to most everyone.