paint the end door a striking colour, horizontal stripes on the ceiling, and 3 large pendant lights. not sure how adventurous you are, but you could consider painting different colour "zones"- 3 different colurs as you walk down the passage.....possibly even 3 short carpet runners. i love the idea of wainscoting-but you will lose precious centimetres. You can get paintable wallpaper wainscotting.

https://www.google.com.au/search?q=Wooden+box+with+glass+lid&client=safari&hl=en&prmd=isvn&tbm=isch&tbo=u&source=univ&fir=aCEjzva5ZlvaDM%253A%252C3zGzxUQtc19ahM%252C_%253BpJDVB_Z9g50FdM%253A%252C3zGzxUQtc19ahM%252C_%253BIx2SQ2MHFkjFEM%253A%252CJGtJcgzAykKqmM%252C_%253B770NbWQdtx4w0M%253A%252CJGtJcgzAykKqmM%252C_%253BZT_OkS8Gp6MiCM%253A%252CS8IXV7uVSpWslM%252C_%253BJXNcX4n-VuinOM%253A%252ChFAQhPQ7ogTD6M%252C_%253BLX6vQv6kmTXkrM%253A%252CIMQ5qzxZuQWdMM%252C_%253B5QExJmd_ujUIbM%253A%252Cl9SMm0rHJnt28M%252C_%253BJqmDfDxlJVC94M%253A%252CxazRz_ETQqOm0M%252C_%253BWHH-F0Yb-IEZ_M%253A%252CCBYX09qSPdH5hM%252C_&usg=__oUwUsn0yC7MXRrs6uVNYdseKKX4%3D&sa=X&ved=0ahUKEwjm-syHn8DMAhWGkKYKHddkCK0QsAQIGQ&biw=1024&bih=672

The hallway is bright and welcoming. Forget a mat as you have dogs as well as elderly family. Unless the chair is serving a purpose, I would remove it and add a full-length wall hung mirror which will reflect light and make the hall look an indeterminate length and you can used it to see your reflection before you leave the house.

I must be weird , because as soon as I saw the picture , I saw 3 areas that I would change -- but they are totally different to the other replies . I actually like the warm timber -- okay , its worn or maybe needs cleaning with 'scrunchy pads' around the door , but to me that's pretty minor . My 3 improvement areas though -- recolour the tiles . Personally , I'd go for black -- I did a sandy tiled terrace 2 or 3 years back using about 2/3rds black gloss paint mixed with 1/3rd turps -- soaked in reasonably well and still looks good . Number 2 -- the lights . I dislike them -- and made even worse by being 2 different styles . Maybe 4 LED downlights if you can get into the ceiling easily ( but then where you remove that coach style light will be discoloured ) . But being relatively tight haha , I'd probably change both the wall and ceiling lights to those black rhombus shades and ornamental style LED filament bulbs . And number 3 -- the door mat . Again , my personal taste , but I dislike those coir mats anyway , and ones with flags or messages even more . Once the tiles had been redone to look black , I'd add a red or teal or royal blue or orange or whatever colour mat matches and complements your interior colours . $500 maximum ( unless you go with the LED downlight idea ) and a couple of hours , and it would totally change the look .